Home / 13,140.42-19,700.16-7,587.47

Finding the Fourth Proportional to 13,140.42, 19,700.16 and 7,587.47

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Solution

The fourth proportional to 13,140.42, 19,700.16 and 7,587.47 is: 11,375.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.42 : 19,700.16 = 7,587.47 : x
  2. Step 2: Convert to fraction form
    13,140.42/19,700.16 = 7,587.47/x
  3. Step 3: Cross multiply
    13,140.42x = 19,700.16 × 7,587.47
  4. Step 4: Simplify right side
    13,140.42x = 149,474,274.49
  5. Step 5: Solve for x
    x = 149,474,274.49/13,140.42
  6. Step 6: Final answer
    x = 11,375.15

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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.