Home / 20,909.28-31,343.76-7,050.72

Finding the Fourth Proportional to 20,909.28, 31,343.76 and 7,050.72

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Solution

The fourth proportional to 20,909.28, 31,343.76 and 7,050.72 is: 10,569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.28 : 31,343.76 = 7,050.72 : x
  2. Step 2: Convert to fraction form
    20,909.28/31,343.76 = 7,050.72/x
  3. Step 3: Cross multiply
    20,909.28x = 31,343.76 × 7,050.72
  4. Step 4: Simplify right side
    20,909.28x = 220,996,075.51
  5. Step 5: Solve for x
    x = 220,996,075.51/20,909.28
  6. Step 6: Final answer
    x = 10,569.28

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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.