Home / 20,913.93-28,851.56-13,356.46

Finding the Fourth Proportional to 20,913.93, 28,851.56 and 13,356.46

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Solution

The fourth proportional to 20,913.93, 28,851.56 and 13,356.46 is: 18,425.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.93 : 28,851.56 = 13,356.46 : x
  2. Step 2: Convert to fraction form
    20,913.93/28,851.56 = 13,356.46/x
  3. Step 3: Cross multiply
    20,913.93x = 28,851.56 × 13,356.46
  4. Step 4: Simplify right side
    20,913.93x = 385,354,726.45
  5. Step 5: Solve for x
    x = 385,354,726.45/20,913.93
  6. Step 6: Final answer
    x = 18,425.74

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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.