Home / 15,564.30-21,479.02-8,490.70

Finding the Fourth Proportional to 15,564.30, 21,479.02 and 8,490.70

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Solution

The fourth proportional to 15,564.30, 21,479.02 and 8,490.70 is: 11,717.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.30 : 21,479.02 = 8,490.70 : x
  2. Step 2: Convert to fraction form
    15,564.30/21,479.02 = 8,490.70/x
  3. Step 3: Cross multiply
    15,564.30x = 21,479.02 × 8,490.70
  4. Step 4: Simplify right side
    15,564.30x = 182,371,915.11
  5. Step 5: Solve for x
    x = 182,371,915.11/15,564.30
  6. Step 6: Final answer
    x = 11,717.32

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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.