Home / 13,316.72-18,371.90-7,649.40

Finding the Fourth Proportional to 13,316.72, 18,371.90 and 7,649.40

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Solution

The fourth proportional to 13,316.72, 18,371.90 and 7,649.40 is: 10,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.72 : 18,371.90 = 7,649.40 : x
  2. Step 2: Convert to fraction form
    13,316.72/18,371.90 = 7,649.40/x
  3. Step 3: Cross multiply
    13,316.72x = 18,371.90 × 7,649.40
  4. Step 4: Simplify right side
    13,316.72x = 140,534,011.86
  5. Step 5: Solve for x
    x = 140,534,011.86/13,316.72
  6. Step 6: Final answer
    x = 10,553.20

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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.