Home / 20,931.24-28,851.86-16,447.28

Finding the Fourth Proportional to 20,931.24, 28,851.86 and 16,447.28

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Solution

The fourth proportional to 20,931.24, 28,851.86 and 16,447.28 is: 22,671.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.24 : 28,851.86 = 16,447.28 : x
  2. Step 2: Convert to fraction form
    20,931.24/28,851.86 = 16,447.28/x
  3. Step 3: Cross multiply
    20,931.24x = 28,851.86 × 16,447.28
  4. Step 4: Simplify right side
    20,931.24x = 474,534,393.45
  5. Step 5: Solve for x
    x = 474,534,393.45/20,931.24
  6. Step 6: Final answer
    x = 22,671.11

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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.