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Finding the Fourth Proportional to 28,065.40, 42,146.70 and 14,943.40

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Solution

The fourth proportional to 28,065.40, 42,146.70 and 14,943.40 is: 22,440.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.40 : 42,146.70 = 14,943.40 : x
  2. Step 2: Convert to fraction form
    28,065.40/42,146.70 = 14,943.40/x
  3. Step 3: Cross multiply
    28,065.40x = 42,146.70 × 14,943.40
  4. Step 4: Simplify right side
    28,065.40x = 629,814,996.78
  5. Step 5: Solve for x
    x = 629,814,996.78/28,065.40
  6. Step 6: Final answer
    x = 22,440.98

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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.