Home / 20,557.17-28,368.95-11,125.80

Finding the Fourth Proportional to 20,557.17, 28,368.95 and 11,125.80

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Solution

The fourth proportional to 20,557.17, 28,368.95 and 11,125.80 is: 15,353.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.17 : 28,368.95 = 11,125.80 : x
  2. Step 2: Convert to fraction form
    20,557.17/28,368.95 = 11,125.80/x
  3. Step 3: Cross multiply
    20,557.17x = 28,368.95 × 11,125.80
  4. Step 4: Simplify right side
    20,557.17x = 315,627,208.28
  5. Step 5: Solve for x
    x = 315,627,208.28/20,557.17
  6. Step 6: Final answer
    x = 15,353.63

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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.