Home / 12,870.40-19,293.28-4,100.48

Finding the Fourth Proportional to 12,870.40, 19,293.28 and 4,100.48

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Solution

The fourth proportional to 12,870.40, 19,293.28 and 4,100.48 is: 6,146.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,870.40 : 19,293.28 = 4,100.48 : x
  2. Step 2: Convert to fraction form
    12,870.40/19,293.28 = 4,100.48/x
  3. Step 3: Cross multiply
    12,870.40x = 19,293.28 × 4,100.48
  4. Step 4: Simplify right side
    12,870.40x = 79,111,708.77
  5. Step 5: Solve for x
    x = 79,111,708.77/12,870.40
  6. Step 6: Final answer
    x = 6,146.79

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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.