Home / 15,509.32-21,403.30-8,436.19

Finding the Fourth Proportional to 15,509.32, 21,403.30 and 8,436.19

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Solution

The fourth proportional to 15,509.32, 21,403.30 and 8,436.19 is: 11,642.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.32 : 21,403.30 = 8,436.19 : x
  2. Step 2: Convert to fraction form
    15,509.32/21,403.30 = 8,436.19/x
  3. Step 3: Cross multiply
    15,509.32x = 21,403.30 × 8,436.19
  4. Step 4: Simplify right side
    15,509.32x = 180,562,305.43
  5. Step 5: Solve for x
    x = 180,562,305.43/15,509.32
  6. Step 6: Final answer
    x = 11,642.18

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Half scale
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Double scale
Find fourth proportional to 15,510.32, 21,404.68 and 8,437.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.