Home / 19,915.07-29,872.87-5,123.66

Finding the Fourth Proportional to 19,915.07, 29,872.87 and 5,123.66

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Solution

The fourth proportional to 19,915.07, 29,872.87 and 5,123.66 is: 7,685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.07 : 29,872.87 = 5,123.66 : x
  2. Step 2: Convert to fraction form
    19,915.07/29,872.87 = 5,123.66/x
  3. Step 3: Cross multiply
    19,915.07x = 29,872.87 × 5,123.66
  4. Step 4: Simplify right side
    19,915.07x = 153,058,266.93
  5. Step 5: Solve for x
    x = 153,058,266.93/19,915.07
  6. Step 6: Final answer
    x = 7,685.55

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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.