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Finding the Fourth Proportional to 15,291.60, 22,915.80 and 9,430.80

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Solution

The fourth proportional to 15,291.60, 22,915.80 and 9,430.80 is: 14,132.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,291.60 : 22,915.80 = 9,430.80 : x
  2. Step 2: Convert to fraction form
    15,291.60/22,915.80 = 9,430.80/x
  3. Step 3: Cross multiply
    15,291.60x = 22,915.80 × 9,430.80
  4. Step 4: Simplify right side
    15,291.60x = 216,114,326.64
  5. Step 5: Solve for x
    x = 216,114,326.64/15,291.60
  6. Step 6: Final answer
    x = 14,132.88

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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.