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Finding the Fourth Proportional to 28,508.64, 42,758.88 and 9,788.32

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Solution

The fourth proportional to 28,508.64, 42,758.88 and 9,788.32 is: 14,681.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,508.64 : 42,758.88 = 9,788.32 : x
  2. Step 2: Convert to fraction form
    28,508.64/42,758.88 = 9,788.32/x
  3. Step 3: Cross multiply
    28,508.64x = 42,758.88 × 9,788.32
  4. Step 4: Simplify right side
    28,508.64x = 418,537,600.28
  5. Step 5: Solve for x
    x = 418,537,600.28/28,508.64
  6. Step 6: Final answer
    x = 14,681.08

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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.