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Finding the Fourth Proportional to 10,478.88, 15,705.72 and 4,628.88

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Solution

The fourth proportional to 10,478.88, 15,705.72 and 4,628.88 is: 6,937.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,478.88 : 15,705.72 = 4,628.88 : x
  2. Step 2: Convert to fraction form
    10,478.88/15,705.72 = 4,628.88/x
  3. Step 3: Cross multiply
    10,478.88x = 15,705.72 × 4,628.88
  4. Step 4: Simplify right side
    10,478.88x = 72,699,893.19
  5. Step 5: Solve for x
    x = 72,699,893.19/10,478.88
  6. Step 6: Final answer
    x = 6,937.75

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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.