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Finding the Fourth Proportional to 40,986.40, 61,490.40 and 14,688.40

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Solution

The fourth proportional to 40,986.40, 61,490.40 and 14,688.40 is: 22,036.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,986.40 : 61,490.40 = 14,688.40 : x
  2. Step 2: Convert to fraction form
    40,986.40/61,490.40 = 14,688.40/x
  3. Step 3: Cross multiply
    40,986.40x = 61,490.40 × 14,688.40
  4. Step 4: Simplify right side
    40,986.40x = 903,195,591.36
  5. Step 5: Solve for x
    x = 903,195,591.36/40,986.40
  6. Step 6: Final answer
    x = 22,036.47

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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.