Home / 20,356.50-28,097.55-12,398.66

Finding the Fourth Proportional to 20,356.50, 28,097.55 and 12,398.66

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Solution

The fourth proportional to 20,356.50, 28,097.55 and 12,398.66 is: 17,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.50 : 28,097.55 = 12,398.66 : x
  2. Step 2: Convert to fraction form
    20,356.50/28,097.55 = 12,398.66/x
  3. Step 3: Cross multiply
    20,356.50x = 28,097.55 × 12,398.66
  4. Step 4: Simplify right side
    20,356.50x = 348,371,969.28
  5. Step 5: Solve for x
    x = 348,371,969.28/20,356.50
  6. Step 6: Final answer
    x = 17,113.55

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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.