Home / 12,938.20-19,407.30-7,106.20

Finding the Fourth Proportional to 12,938.20, 19,407.30 and 7,106.20

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Solution

The fourth proportional to 12,938.20, 19,407.30 and 7,106.20 is: 10,659.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.20 : 19,407.30 = 7,106.20 : x
  2. Step 2: Convert to fraction form
    12,938.20/19,407.30 = 7,106.20/x
  3. Step 3: Cross multiply
    12,938.20x = 19,407.30 × 7,106.20
  4. Step 4: Simplify right side
    12,938.20x = 137,912,155.26
  5. Step 5: Solve for x
    x = 137,912,155.26/12,938.20
  6. Step 6: Final answer
    x = 10,659.30

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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.