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Finding the Fourth Proportional to 28,324.48, 42,428.80 and 13,488.48

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Solution

The fourth proportional to 28,324.48, 42,428.80 and 13,488.48 is: 20,205.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,324.48 : 42,428.80 = 13,488.48 : x
  2. Step 2: Convert to fraction form
    28,324.48/42,428.80 = 13,488.48/x
  3. Step 3: Cross multiply
    28,324.48x = 42,428.80 × 13,488.48
  4. Step 4: Simplify right side
    28,324.48x = 572,300,020.22
  5. Step 5: Solve for x
    x = 572,300,020.22/28,324.48
  6. Step 6: Final answer
    x = 20,205.14

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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.