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Finding the Fourth Proportional to 15,915.70, 22,312.70 and 15,915.70

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Solution

The fourth proportional to 15,915.70, 22,312.70 and 15,915.70 is: 22,312.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,915.70 : 22,312.70 = 15,915.70 : x
  2. Step 2: Convert to fraction form
    15,915.70/22,312.70 = 15,915.70/x
  3. Step 3: Cross multiply
    15,915.70x = 22,312.70 × 15,915.70
  4. Step 4: Simplify right side
    15,915.70x = 355,122,239.39
  5. Step 5: Solve for x
    x = 355,122,239.39/15,915.70
  6. Step 6: Final answer
    x = 22,312.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.