Home / 15,631.26-21,572.38-8,915.35

Finding the Fourth Proportional to 15,631.26, 21,572.38 and 8,915.35

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Solution

The fourth proportional to 15,631.26, 21,572.38 and 8,915.35 is: 12,303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.26 : 21,572.38 = 8,915.35 : x
  2. Step 2: Convert to fraction form
    15,631.26/21,572.38 = 8,915.35/x
  3. Step 3: Cross multiply
    15,631.26x = 21,572.38 × 8,915.35
  4. Step 4: Simplify right side
    15,631.26x = 192,325,265.55
  5. Step 5: Solve for x
    x = 192,325,265.55/15,631.26
  6. Step 6: Final answer
    x = 12,303.89

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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.