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Finding the Fourth Proportional to 56,490.48, 84,708.78 and 20,927.40

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Solution

The fourth proportional to 56,490.48, 84,708.78 and 20,927.40 is: 31,381.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,490.48 : 84,708.78 = 20,927.40 : x
  2. Step 2: Convert to fraction form
    56,490.48/84,708.78 = 20,927.40/x
  3. Step 3: Cross multiply
    56,490.48x = 84,708.78 × 20,927.40
  4. Step 4: Simplify right side
    56,490.48x = 1,772,734,522.57
  5. Step 5: Solve for x
    x = 1,772,734,522.57/56,490.48
  6. Step 6: Final answer
    x = 31,381.12

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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.