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Finding the Fourth Proportional to 19,272.40, 28,908.60 and 15,931.60

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Solution

The fourth proportional to 19,272.40, 28,908.60 and 15,931.60 is: 23,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,272.40 : 28,908.60 = 15,931.60 : x
  2. Step 2: Convert to fraction form
    19,272.40/28,908.60 = 15,931.60/x
  3. Step 3: Cross multiply
    19,272.40x = 28,908.60 × 15,931.60
  4. Step 4: Simplify right side
    19,272.40x = 460,560,251.76
  5. Step 5: Solve for x
    x = 460,560,251.76/19,272.40
  6. Step 6: Final answer
    x = 23,897.40

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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.