Home / 25,386.28-38,013.18-20,428.84

Finding the Fourth Proportional to 25,386.28, 38,013.18 and 20,428.84

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Solution

The fourth proportional to 25,386.28, 38,013.18 and 20,428.84 is: 30,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,386.28 : 38,013.18 = 20,428.84 : x
  2. Step 2: Convert to fraction form
    25,386.28/38,013.18 = 20,428.84/x
  3. Step 3: Cross multiply
    25,386.28x = 38,013.18 × 20,428.84
  4. Step 4: Simplify right side
    25,386.28x = 776,565,172.11
  5. Step 5: Solve for x
    x = 776,565,172.11/25,386.28
  6. Step 6: Final answer
    x = 30,589.96

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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.