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Finding the Fourth Proportional to 23,870.76, 35,750.64 and 20,918.28

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Solution

The fourth proportional to 23,870.76, 35,750.64 and 20,918.28 is: 31,328.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,870.76 : 35,750.64 = 20,918.28 : x
  2. Step 2: Convert to fraction form
    23,870.76/35,750.64 = 20,918.28/x
  3. Step 3: Cross multiply
    23,870.76x = 35,750.64 × 20,918.28
  4. Step 4: Simplify right side
    23,870.76x = 747,841,897.70
  5. Step 5: Solve for x
    x = 747,841,897.70/23,870.76
  6. Step 6: Final answer
    x = 31,328.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.