Home / 51,355.20-70,869.12-28,999.20

Finding the Fourth Proportional to 51,355.20, 70,869.12 and 28,999.20

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Solution

The fourth proportional to 51,355.20, 70,869.12 and 28,999.20 is: 40,018.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,355.20 : 70,869.12 = 28,999.20 : x
  2. Step 2: Convert to fraction form
    51,355.20/70,869.12 = 28,999.20/x
  3. Step 3: Cross multiply
    51,355.20x = 70,869.12 × 28,999.20
  4. Step 4: Simplify right side
    51,355.20x = 2,055,147,784.70
  5. Step 5: Solve for x
    x = 2,055,147,784.70/51,355.20
  6. Step 6: Final answer
    x = 40,018.30

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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.