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Finding the Fourth Proportional to 31,905.32, 47,860.68 and 9,718.88

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Solution

The fourth proportional to 31,905.32, 47,860.68 and 9,718.88 is: 14,579.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,905.32 : 47,860.68 = 9,718.88 : x
  2. Step 2: Convert to fraction form
    31,905.32/47,860.68 = 9,718.88/x
  3. Step 3: Cross multiply
    31,905.32x = 47,860.68 × 9,718.88
  4. Step 4: Simplify right side
    31,905.32x = 465,151,966.34
  5. Step 5: Solve for x
    x = 465,151,966.34/31,905.32
  6. Step 6: Final answer
    x = 14,579.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.