Home / 15,518.32-21,415.67-8,445.13

Finding the Fourth Proportional to 15,518.32, 21,415.67 and 8,445.13

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Solution

The fourth proportional to 15,518.32, 21,415.67 and 8,445.13 is: 11,654.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.32 : 21,415.67 = 8,445.13 : x
  2. Step 2: Convert to fraction form
    15,518.32/21,415.67 = 8,445.13/x
  3. Step 3: Cross multiply
    15,518.32x = 21,415.67 × 8,445.13
  4. Step 4: Simplify right side
    15,518.32x = 180,858,117.19
  5. Step 5: Solve for x
    x = 180,858,117.19/15,518.32
  6. Step 6: Final answer
    x = 11,654.49

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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.