Home / 20,459.16-28,224.10-13,288.57

Finding the Fourth Proportional to 20,459.16, 28,224.10 and 13,288.57

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Solution

The fourth proportional to 20,459.16, 28,224.10 and 13,288.57 is: 18,332.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.16 : 28,224.10 = 13,288.57 : x
  2. Step 2: Convert to fraction form
    20,459.16/28,224.10 = 13,288.57/x
  3. Step 3: Cross multiply
    20,459.16x = 28,224.10 × 13,288.57
  4. Step 4: Simplify right side
    20,459.16x = 375,057,928.54
  5. Step 5: Solve for x
    x = 375,057,928.54/20,459.16
  6. Step 6: Final answer
    x = 18,332.03

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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.