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Finding the Fourth Proportional to 7,915.78, 10,925.12 and 4,560.53

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Solution

The fourth proportional to 7,915.78, 10,925.12 and 4,560.53 is: 6,294.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.78 : 10,925.12 = 4,560.53 : x
  2. Step 2: Convert to fraction form
    7,915.78/10,925.12 = 4,560.53/x
  3. Step 3: Cross multiply
    7,915.78x = 10,925.12 × 4,560.53
  4. Step 4: Simplify right side
    7,915.78x = 49,824,314.71
  5. Step 5: Solve for x
    x = 49,824,314.71/7,915.78
  6. Step 6: Final answer
    x = 6,294.31

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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.