Home / 28,428.04-42,603.18-20,634.76

Finding the Fourth Proportional to 28,428.04, 42,603.18 and 20,634.76

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Solution

The fourth proportional to 28,428.04, 42,603.18 and 20,634.76 is: 30,923.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.04 : 42,603.18 = 20,634.76 : x
  2. Step 2: Convert to fraction form
    28,428.04/42,603.18 = 20,634.76/x
  3. Step 3: Cross multiply
    28,428.04x = 42,603.18 × 20,634.76
  4. Step 4: Simplify right side
    28,428.04x = 879,106,394.54
  5. Step 5: Solve for x
    x = 879,106,394.54/28,428.04
  6. Step 6: Final answer
    x = 30,923.92

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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.