Home / 15,078.42-20,807.28-9,106.56

Finding the Fourth Proportional to 15,078.42, 20,807.28 and 9,106.56

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Solution

The fourth proportional to 15,078.42, 20,807.28 and 9,106.56 is: 12,566.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.42 : 20,807.28 = 9,106.56 : x
  2. Step 2: Convert to fraction form
    15,078.42/20,807.28 = 9,106.56/x
  3. Step 3: Cross multiply
    15,078.42x = 20,807.28 × 9,106.56
  4. Step 4: Simplify right side
    15,078.42x = 189,482,743.76
  5. Step 5: Solve for x
    x = 189,482,743.76/15,078.42
  6. Step 6: Final answer
    x = 12,566.49

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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.