Home / 15,399.12-21,250.36-8,684.70

Finding the Fourth Proportional to 15,399.12, 21,250.36 and 8,684.70

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Solution

The fourth proportional to 15,399.12, 21,250.36 and 8,684.70 is: 11,984.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.12 : 21,250.36 = 8,684.70 : x
  2. Step 2: Convert to fraction form
    15,399.12/21,250.36 = 8,684.70/x
  3. Step 3: Cross multiply
    15,399.12x = 21,250.36 × 8,684.70
  4. Step 4: Simplify right side
    15,399.12x = 184,553,001.49
  5. Step 5: Solve for x
    x = 184,553,001.49/15,399.12
  6. Step 6: Final answer
    x = 11,984.65

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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.