Home / 15,509.50-21,403.38-8,436.04

Finding the Fourth Proportional to 15,509.50, 21,403.38 and 8,436.04

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Solution

The fourth proportional to 15,509.50, 21,403.38 and 8,436.04 is: 11,641.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.50 : 21,403.38 = 8,436.04 : x
  2. Step 2: Convert to fraction form
    15,509.50/21,403.38 = 8,436.04/x
  3. Step 3: Cross multiply
    15,509.50x = 21,403.38 × 8,436.04
  4. Step 4: Simplify right side
    15,509.50x = 180,559,769.82
  5. Step 5: Solve for x
    x = 180,559,769.82/15,509.50
  6. Step 6: Final answer
    x = 11,641.88

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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.