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Finding the Fourth Proportional to 10,505.78, 15,759.10 and 4,888.72

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Solution

The fourth proportional to 10,505.78, 15,759.10 and 4,888.72 is: 7,333.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,505.78 : 15,759.10 = 4,888.72 : x
  2. Step 2: Convert to fraction form
    10,505.78/15,759.10 = 4,888.72/x
  3. Step 3: Cross multiply
    10,505.78x = 15,759.10 × 4,888.72
  4. Step 4: Simplify right side
    10,505.78x = 77,041,827.35
  5. Step 5: Solve for x
    x = 77,041,827.35/10,505.78
  6. Step 6: Final answer
    x = 7,333.28

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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.