Home / 14,139.90-21,203.78-7,117.20

Finding the Fourth Proportional to 14,139.90, 21,203.78 and 7,117.20

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Solution

The fourth proportional to 14,139.90, 21,203.78 and 7,117.20 is: 10,672.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.90 : 21,203.78 = 7,117.20 : x
  2. Step 2: Convert to fraction form
    14,139.90/21,203.78 = 7,117.20/x
  3. Step 3: Cross multiply
    14,139.90x = 21,203.78 × 7,117.20
  4. Step 4: Simplify right side
    14,139.90x = 150,911,507.43
  5. Step 5: Solve for x
    x = 150,911,507.43/14,139.90
  6. Step 6: Final answer
    x = 10,672.74

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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.