Home / 12,719.49-17,548.81-7,685.20

Finding the Fourth Proportional to 12,719.49, 17,548.81 and 7,685.20

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Solution

The fourth proportional to 12,719.49, 17,548.81 and 7,685.20 is: 10,603.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,719.49 : 17,548.81 = 7,685.20 : x
  2. Step 2: Convert to fraction form
    12,719.49/17,548.81 = 7,685.20/x
  3. Step 3: Cross multiply
    12,719.49x = 17,548.81 × 7,685.20
  4. Step 4: Simplify right side
    12,719.49x = 134,866,114.61
  5. Step 5: Solve for x
    x = 134,866,114.61/12,719.49
  6. Step 6: Final answer
    x = 10,603.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.