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Finding the Fourth Proportional to 18,937.61, 26,132.36 and 10,980.32

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Solution

The fourth proportional to 18,937.61, 26,132.36 and 10,980.32 is: 15,151.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.61 : 26,132.36 = 10,980.32 : x
  2. Step 2: Convert to fraction form
    18,937.61/26,132.36 = 10,980.32/x
  3. Step 3: Cross multiply
    18,937.61x = 26,132.36 × 10,980.32
  4. Step 4: Simplify right side
    18,937.61x = 286,941,620.25
  5. Step 5: Solve for x
    x = 286,941,620.25/18,937.61
  6. Step 6: Final answer
    x = 15,151.94

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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.