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Finding the Fourth Proportional to 55,892.80, 83,810.40 and 20,814.40

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Solution

The fourth proportional to 55,892.80, 83,810.40 and 20,814.40 is: 31,210.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,892.80 : 83,810.40 = 20,814.40 : x
  2. Step 2: Convert to fraction form
    55,892.80/83,810.40 = 20,814.40/x
  3. Step 3: Cross multiply
    55,892.80x = 83,810.40 × 20,814.40
  4. Step 4: Simplify right side
    55,892.80x = 1,744,463,189.76
  5. Step 5: Solve for x
    x = 1,744,463,189.76/55,892.80
  6. Step 6: Final answer
    x = 31,210.87

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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.