Home / 12,870.88-19,306.53-5,079.63

Finding the Fourth Proportional to 12,870.88, 19,306.53 and 5,079.63

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Solution

The fourth proportional to 12,870.88, 19,306.53 and 5,079.63 is: 7,619.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,870.88 : 19,306.53 = 5,079.63 : x
  2. Step 2: Convert to fraction form
    12,870.88/19,306.53 = 5,079.63/x
  3. Step 3: Cross multiply
    12,870.88x = 19,306.53 × 5,079.63
  4. Step 4: Simplify right side
    12,870.88x = 98,070,028.98
  5. Step 5: Solve for x
    x = 98,070,028.98/12,870.88
  6. Step 6: Final answer
    x = 7,619.53

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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.