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Finding the Fourth Proportional to 19,276.80, 28,915.20 and 9,422.40

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Solution

The fourth proportional to 19,276.80, 28,915.20 and 9,422.40 is: 14,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,276.80 : 28,915.20 = 9,422.40 : x
  2. Step 2: Convert to fraction form
    19,276.80/28,915.20 = 9,422.40/x
  3. Step 3: Cross multiply
    19,276.80x = 28,915.20 × 9,422.40
  4. Step 4: Simplify right side
    19,276.80x = 272,450,580.48
  5. Step 5: Solve for x
    x = 272,450,580.48/19,276.80
  6. Step 6: Final answer
    x = 14,133.60

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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.