Home / 15,311.59-21,131.49-9,347.25

Finding the Fourth Proportional to 15,311.59, 21,131.49 and 9,347.25

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Solution

The fourth proportional to 15,311.59, 21,131.49 and 9,347.25 is: 12,900.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.59 : 21,131.49 = 9,347.25 : x
  2. Step 2: Convert to fraction form
    15,311.59/21,131.49 = 9,347.25/x
  3. Step 3: Cross multiply
    15,311.59x = 21,131.49 × 9,347.25
  4. Step 4: Simplify right side
    15,311.59x = 197,521,319.90
  5. Step 5: Solve for x
    x = 197,521,319.90/15,311.59
  6. Step 6: Final answer
    x = 12,900.12

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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.