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Finding the Fourth Proportional to 5,642.98, 7,787.13 and 3,124.99

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Solution

The fourth proportional to 5,642.98, 7,787.13 and 3,124.99 is: 4,312.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.98 : 7,787.13 = 3,124.99 : x
  2. Step 2: Convert to fraction form
    5,642.98/7,787.13 = 3,124.99/x
  3. Step 3: Cross multiply
    5,642.98x = 7,787.13 × 3,124.99
  4. Step 4: Simplify right side
    5,642.98x = 24,334,703.38
  5. Step 5: Solve for x
    x = 24,334,703.38/5,642.98
  6. Step 6: Final answer
    x = 4,312.39

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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.