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Finding the Fourth Proportional to 15,645.17, 21,573.05 and 9,970.94

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Solution

The fourth proportional to 15,645.17, 21,573.05 and 9,970.94 is: 13,748.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,645.17 : 21,573.05 = 9,970.94 : x
  2. Step 2: Convert to fraction form
    15,645.17/21,573.05 = 9,970.94/x
  3. Step 3: Cross multiply
    15,645.17x = 21,573.05 × 9,970.94
  4. Step 4: Simplify right side
    15,645.17x = 215,103,591.24
  5. Step 5: Solve for x
    x = 215,103,591.24/15,645.17
  6. Step 6: Final answer
    x = 13,748.88

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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.