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Finding the Fourth Proportional to 23,478.86, 35,008.86 and 20,870.86

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Solution

The fourth proportional to 23,478.86, 35,008.86 and 20,870.86 is: 31,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,478.86 : 35,008.86 = 20,870.86 : x
  2. Step 2: Convert to fraction form
    23,478.86/35,008.86 = 20,870.86/x
  3. Step 3: Cross multiply
    23,478.86x = 35,008.86 × 20,870.86
  4. Step 4: Simplify right side
    23,478.86x = 730,665,015.82
  5. Step 5: Solve for x
    x = 730,665,015.82/23,478.86
  6. Step 6: Final answer
    x = 31,120.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.