Home / 15,030.38-20,740.20-8,315.07

Finding the Fourth Proportional to 15,030.38, 20,740.20 and 8,315.07

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Solution

The fourth proportional to 15,030.38, 20,740.20 and 8,315.07 is: 11,473.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.38 : 20,740.20 = 8,315.07 : x
  2. Step 2: Convert to fraction form
    15,030.38/20,740.20 = 8,315.07/x
  3. Step 3: Cross multiply
    15,030.38x = 20,740.20 × 8,315.07
  4. Step 4: Simplify right side
    15,030.38x = 172,456,214.81
  5. Step 5: Solve for x
    x = 172,456,214.81/15,030.38
  6. Step 6: Final answer
    x = 11,473.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.