Home / 15,216.11-21,001.73-9,901.70

Finding the Fourth Proportional to 15,216.11, 21,001.73 and 9,901.70

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Solution

The fourth proportional to 15,216.11, 21,001.73 and 9,901.70 is: 13,666.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.11 : 21,001.73 = 9,901.70 : x
  2. Step 2: Convert to fraction form
    15,216.11/21,001.73 = 9,901.70/x
  3. Step 3: Cross multiply
    15,216.11x = 21,001.73 × 9,901.70
  4. Step 4: Simplify right side
    15,216.11x = 207,952,749.69
  5. Step 5: Solve for x
    x = 207,952,749.69/15,216.11
  6. Step 6: Final answer
    x = 13,666.62

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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.