Home / 12,438.16-18,657.28-8,530.72

Finding the Fourth Proportional to 12,438.16, 18,657.28 and 8,530.72

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Solution

The fourth proportional to 12,438.16, 18,657.28 and 8,530.72 is: 12,796.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.16 : 18,657.28 = 8,530.72 : x
  2. Step 2: Convert to fraction form
    12,438.16/18,657.28 = 8,530.72/x
  3. Step 3: Cross multiply
    12,438.16x = 18,657.28 × 8,530.72
  4. Step 4: Simplify right side
    12,438.16x = 159,160,031.64
  5. Step 5: Solve for x
    x = 159,160,031.64/12,438.16
  6. Step 6: Final answer
    x = 12,796.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.