Home / 34,139.28-51,208.40-20,816.20

Finding the Fourth Proportional to 34,139.28, 51,208.40 and 20,816.20

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Solution

The fourth proportional to 34,139.28, 51,208.40 and 20,816.20 is: 31,223.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,139.28 : 51,208.40 = 20,816.20 : x
  2. Step 2: Convert to fraction form
    34,139.28/51,208.40 = 20,816.20/x
  3. Step 3: Cross multiply
    34,139.28x = 51,208.40 × 20,816.20
  4. Step 4: Simplify right side
    34,139.28x = 1,065,964,220.10
  5. Step 5: Solve for x
    x = 1,065,964,220.10/34,139.28
  6. Step 6: Final answer
    x = 31,223.98

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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.