Home / 20,318.10-28,040.22-11,366.21

Finding the Fourth Proportional to 20,318.10, 28,040.22 and 11,366.21

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Solution

The fourth proportional to 20,318.10, 28,040.22 and 11,366.21 is: 15,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.10 : 28,040.22 = 11,366.21 : x
  2. Step 2: Convert to fraction form
    20,318.10/28,040.22 = 11,366.21/x
  3. Step 3: Cross multiply
    20,318.10x = 28,040.22 × 11,366.21
  4. Step 4: Simplify right side
    20,318.10x = 318,710,831.93
  5. Step 5: Solve for x
    x = 318,710,831.93/20,318.10
  6. Step 6: Final answer
    x = 15,686.05

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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.