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Finding the Fourth Proportional to 13,386.52, 18,471.65 and 7,417.90

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Solution

The fourth proportional to 13,386.52, 18,471.65 and 7,417.90 is: 10,235.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.52 : 18,471.65 = 7,417.90 : x
  2. Step 2: Convert to fraction form
    13,386.52/18,471.65 = 7,417.90/x
  3. Step 3: Cross multiply
    13,386.52x = 18,471.65 × 7,417.90
  4. Step 4: Simplify right side
    13,386.52x = 137,020,852.54
  5. Step 5: Solve for x
    x = 137,020,852.54/13,386.52
  6. Step 6: Final answer
    x = 10,235.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.