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Finding the Fourth Proportional to 55,978.84, 83,979.34 and 15,998.20

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Solution

The fourth proportional to 55,978.84, 83,979.34 and 15,998.20 is: 24,000.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,978.84 : 83,979.34 = 15,998.20 : x
  2. Step 2: Convert to fraction form
    55,978.84/83,979.34 = 15,998.20/x
  3. Step 3: Cross multiply
    55,978.84x = 83,979.34 × 15,998.20
  4. Step 4: Simplify right side
    55,978.84x = 1,343,518,277.19
  5. Step 5: Solve for x
    x = 1,343,518,277.19/55,978.84
  6. Step 6: Final answer
    x = 24,000.47

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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.