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Finding the Fourth Proportional to 19,266.40, 28,899.60 and 10,031.20

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Solution

The fourth proportional to 19,266.40, 28,899.60 and 10,031.20 is: 15,046.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,266.40 : 28,899.60 = 10,031.20 : x
  2. Step 2: Convert to fraction form
    19,266.40/28,899.60 = 10,031.20/x
  3. Step 3: Cross multiply
    19,266.40x = 28,899.60 × 10,031.20
  4. Step 4: Simplify right side
    19,266.40x = 289,897,667.52
  5. Step 5: Solve for x
    x = 289,897,667.52/19,266.40
  6. Step 6: Final answer
    x = 15,046.80

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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.