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Finding the Fourth Proportional to 17,878.32, 24,670.08 and 9,920.88

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Solution

The fourth proportional to 17,878.32, 24,670.08 and 9,920.88 is: 13,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,878.32 : 24,670.08 = 9,920.88 : x
  2. Step 2: Convert to fraction form
    17,878.32/24,670.08 = 9,920.88/x
  3. Step 3: Cross multiply
    17,878.32x = 24,670.08 × 9,920.88
  4. Step 4: Simplify right side
    17,878.32x = 244,748,903.27
  5. Step 5: Solve for x
    x = 244,748,903.27/17,878.32
  6. Step 6: Final answer
    x = 13,689.70

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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.