Home / 15,030.12-20,740.26-8,315.64

Finding the Fourth Proportional to 15,030.12, 20,740.26 and 8,315.64

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Solution

The fourth proportional to 15,030.12, 20,740.26 and 8,315.64 is: 11,474.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.12 : 20,740.26 = 8,315.64 : x
  2. Step 2: Convert to fraction form
    15,030.12/20,740.26 = 8,315.64/x
  3. Step 3: Cross multiply
    15,030.12x = 20,740.26 × 8,315.64
  4. Step 4: Simplify right side
    15,030.12x = 172,468,535.67
  5. Step 5: Solve for x
    x = 172,468,535.67/15,030.12
  6. Step 6: Final answer
    x = 11,474.86

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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.