Home / 10,918.08-15,032.39-9,920.37

Finding the Fourth Proportional to 10,918.08, 15,032.39 and 9,920.37

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Solution

The fourth proportional to 10,918.08, 15,032.39 and 9,920.37 is: 13,658.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.08 : 15,032.39 = 9,920.37 : x
  2. Step 2: Convert to fraction form
    10,918.08/15,032.39 = 9,920.37/x
  3. Step 3: Cross multiply
    10,918.08x = 15,032.39 × 9,920.37
  4. Step 4: Simplify right side
    10,918.08x = 149,126,821.18
  5. Step 5: Solve for x
    x = 149,126,821.18/10,918.08
  6. Step 6: Final answer
    x = 13,658.70

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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.