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Finding the Fourth Proportional to 25,959.46, 38,915.79 and 9,315.55

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Solution

The fourth proportional to 25,959.46, 38,915.79 and 9,315.55 is: 13,964.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,959.46 : 38,915.79 = 9,315.55 : x
  2. Step 2: Convert to fraction form
    25,959.46/38,915.79 = 9,315.55/x
  3. Step 3: Cross multiply
    25,959.46x = 38,915.79 × 9,315.55
  4. Step 4: Simplify right side
    25,959.46x = 362,521,987.53
  5. Step 5: Solve for x
    x = 362,521,987.53/25,959.46
  6. Step 6: Final answer
    x = 13,964.93

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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.