Home / 15,218.11-21,004.49-9,903.70

Finding the Fourth Proportional to 15,218.11, 21,004.49 and 9,903.70

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Solution

The fourth proportional to 15,218.11, 21,004.49 and 9,903.70 is: 13,669.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.11 : 21,004.49 = 9,903.70 : x
  2. Step 2: Convert to fraction form
    15,218.11/21,004.49 = 9,903.70/x
  3. Step 3: Cross multiply
    15,218.11x = 21,004.49 × 9,903.70
  4. Step 4: Simplify right side
    15,218.11x = 208,022,167.61
  5. Step 5: Solve for x
    x = 208,022,167.61/15,218.11
  6. Step 6: Final answer
    x = 13,669.38

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Double scale
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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.