Home / 15,355.17-21,189.60-9,387.09

Finding the Fourth Proportional to 15,355.17, 21,189.60 and 9,387.09

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Solution

The fourth proportional to 15,355.17, 21,189.60 and 9,387.09 is: 12,953.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.17 : 21,189.60 = 9,387.09 : x
  2. Step 2: Convert to fraction form
    15,355.17/21,189.60 = 9,387.09/x
  3. Step 3: Cross multiply
    15,355.17x = 21,189.60 × 9,387.09
  4. Step 4: Simplify right side
    15,355.17x = 198,908,682.26
  5. Step 5: Solve for x
    x = 198,908,682.26/15,355.17
  6. Step 6: Final answer
    x = 12,953.86

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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.