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Finding the Fourth Proportional to 15,030.52, 20,741.34 and 8,315.80

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Solution

The fourth proportional to 15,030.52, 20,741.34 and 8,315.80 is: 11,475.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.52 : 20,741.34 = 8,315.80 : x
  2. Step 2: Convert to fraction form
    15,030.52/20,741.34 = 8,315.80/x
  3. Step 3: Cross multiply
    15,030.52x = 20,741.34 × 8,315.80
  4. Step 4: Simplify right side
    15,030.52x = 172,480,835.17
  5. Step 5: Solve for x
    x = 172,480,835.17/15,030.52
  6. Step 6: Final answer
    x = 11,475.37

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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.