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Finding the Fourth Proportional to 28,019.24, 42,031.28 and 9,295.28

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Solution

The fourth proportional to 28,019.24, 42,031.28 and 9,295.28 is: 13,943.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.24 : 42,031.28 = 9,295.28 : x
  2. Step 2: Convert to fraction form
    28,019.24/42,031.28 = 9,295.28/x
  3. Step 3: Cross multiply
    28,019.24x = 42,031.28 × 9,295.28
  4. Step 4: Simplify right side
    28,019.24x = 390,692,516.36
  5. Step 5: Solve for x
    x = 390,692,516.36/28,019.24
  6. Step 6: Final answer
    x = 13,943.72

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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.