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Finding the Fourth Proportional to 18,826.16, 25,978.20 and 10,870.92

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Solution

The fourth proportional to 18,826.16, 25,978.20 and 10,870.92 is: 15,000.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,826.16 : 25,978.20 = 10,870.92 : x
  2. Step 2: Convert to fraction form
    18,826.16/25,978.20 = 10,870.92/x
  3. Step 3: Cross multiply
    18,826.16x = 25,978.20 × 10,870.92
  4. Step 4: Simplify right side
    18,826.16x = 282,406,933.94
  5. Step 5: Solve for x
    x = 282,406,933.94/18,826.16
  6. Step 6: Final answer
    x = 15,000.77

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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.