Home / 20,325.28-30,364.76-12,870.04

Finding the Fourth Proportional to 20,325.28, 30,364.76 and 12,870.04

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Solution

The fourth proportional to 20,325.28, 30,364.76 and 12,870.04 is: 19,227.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,325.28 : 30,364.76 = 12,870.04 : x
  2. Step 2: Convert to fraction form
    20,325.28/30,364.76 = 12,870.04/x
  3. Step 3: Cross multiply
    20,325.28x = 30,364.76 × 12,870.04
  4. Step 4: Simplify right side
    20,325.28x = 390,795,675.79
  5. Step 5: Solve for x
    x = 390,795,675.79/20,325.28
  6. Step 6: Final answer
    x = 19,227.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.