Home / 28,210.40-42,301.92-8,485.28

Finding the Fourth Proportional to 28,210.40, 42,301.92 and 8,485.28

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Solution

The fourth proportional to 28,210.40, 42,301.92 and 8,485.28 is: 12,723.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,210.40 : 42,301.92 = 8,485.28 : x
  2. Step 2: Convert to fraction form
    28,210.40/42,301.92 = 8,485.28/x
  3. Step 3: Cross multiply
    28,210.40x = 42,301.92 × 8,485.28
  4. Step 4: Simplify right side
    28,210.40x = 358,943,635.74
  5. Step 5: Solve for x
    x = 358,943,635.74/28,210.40
  6. Step 6: Final answer
    x = 12,723.81

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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.