Home / 15,640.32-21,583.65-8,470.29

Finding the Fourth Proportional to 15,640.32, 21,583.65 and 8,470.29

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Solution

The fourth proportional to 15,640.32, 21,583.65 and 8,470.29 is: 11,689.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.32 : 21,583.65 = 8,470.29 : x
  2. Step 2: Convert to fraction form
    15,640.32/21,583.65 = 8,470.29/x
  3. Step 3: Cross multiply
    15,640.32x = 21,583.65 × 8,470.29
  4. Step 4: Simplify right side
    15,640.32x = 182,819,774.76
  5. Step 5: Solve for x
    x = 182,819,774.76/15,640.32
  6. Step 6: Final answer
    x = 11,689.00

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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.