Home / 37,972.81-52,401.89-20,978.28

Finding the Fourth Proportional to 37,972.81, 52,401.89 and 20,978.28

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Solution

The fourth proportional to 37,972.81, 52,401.89 and 20,978.28 is: 28,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,972.81 : 52,401.89 = 20,978.28 : x
  2. Step 2: Convert to fraction form
    37,972.81/52,401.89 = 20,978.28/x
  3. Step 3: Cross multiply
    37,972.81x = 52,401.89 × 20,978.28
  4. Step 4: Simplify right side
    37,972.81x = 1,099,301,713.31
  5. Step 5: Solve for x
    x = 1,099,301,713.31/37,972.81
  6. Step 6: Final answer
    x = 28,949.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.