Home / 20,277.28-30,417.72-7,129.76

Finding the Fourth Proportional to 20,277.28, 30,417.72 and 7,129.76

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Solution

The fourth proportional to 20,277.28, 30,417.72 and 7,129.76 is: 10,695.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,277.28 : 30,417.72 = 7,129.76 : x
  2. Step 2: Convert to fraction form
    20,277.28/30,417.72 = 7,129.76/x
  3. Step 3: Cross multiply
    20,277.28x = 30,417.72 × 7,129.76
  4. Step 4: Simplify right side
    20,277.28x = 216,871,043.35
  5. Step 5: Solve for x
    x = 216,871,043.35/20,277.28
  6. Step 6: Final answer
    x = 10,695.27

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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.