Home / 15,564.13-21,478.17-8,490.40

Finding the Fourth Proportional to 15,564.13, 21,478.17 and 8,490.40

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Solution

The fourth proportional to 15,564.13, 21,478.17 and 8,490.40 is: 11,716.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.13 : 21,478.17 = 8,490.40 : x
  2. Step 2: Convert to fraction form
    15,564.13/21,478.17 = 8,490.40/x
  3. Step 3: Cross multiply
    15,564.13x = 21,478.17 × 8,490.40
  4. Step 4: Simplify right side
    15,564.13x = 182,358,254.57
  5. Step 5: Solve for x
    x = 182,358,254.57/15,564.13
  6. Step 6: Final answer
    x = 11,716.57

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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.