Home / 13,172.40-19,726.60-7,002.80

Finding the Fourth Proportional to 13,172.40, 19,726.60 and 7,002.80

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Solution

The fourth proportional to 13,172.40, 19,726.60 and 7,002.80 is: 10,487.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.40 : 19,726.60 = 7,002.80 : x
  2. Step 2: Convert to fraction form
    13,172.40/19,726.60 = 7,002.80/x
  3. Step 3: Cross multiply
    13,172.40x = 19,726.60 × 7,002.80
  4. Step 4: Simplify right side
    13,172.40x = 138,141,434.48
  5. Step 5: Solve for x
    x = 138,141,434.48/13,172.40
  6. Step 6: Final answer
    x = 10,487.19

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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.