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Finding the Fourth Proportional to 15,045.76, 20,756.59 and 9,074.11

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Solution

The fourth proportional to 15,045.76, 20,756.59 and 9,074.11 is: 12,518.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,045.76 : 20,756.59 = 9,074.11 : x
  2. Step 2: Convert to fraction form
    15,045.76/20,756.59 = 9,074.11/x
  3. Step 3: Cross multiply
    15,045.76x = 20,756.59 × 9,074.11
  4. Step 4: Simplify right side
    15,045.76x = 188,347,580.88
  5. Step 5: Solve for x
    x = 188,347,580.88/15,045.76
  6. Step 6: Final answer
    x = 12,518.32

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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.