Home / 13,135.28-18,129.02-7,830.43

Finding the Fourth Proportional to 13,135.28, 18,129.02 and 7,830.43

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Solution

The fourth proportional to 13,135.28, 18,129.02 and 7,830.43 is: 10,807.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.28 : 18,129.02 = 7,830.43 : x
  2. Step 2: Convert to fraction form
    13,135.28/18,129.02 = 7,830.43/x
  3. Step 3: Cross multiply
    13,135.28x = 18,129.02 × 7,830.43
  4. Step 4: Simplify right side
    13,135.28x = 141,957,937.60
  5. Step 5: Solve for x
    x = 141,957,937.60/13,135.28
  6. Step 6: Final answer
    x = 10,807.38

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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.