Home / 13,189.20-18,205.20-10,856.40

Finding the Fourth Proportional to 13,189.20, 18,205.20 and 10,856.40

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Solution

The fourth proportional to 13,189.20, 18,205.20 and 10,856.40 is: 14,985.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.20 : 18,205.20 = 10,856.40 : x
  2. Step 2: Convert to fraction form
    13,189.20/18,205.20 = 10,856.40/x
  3. Step 3: Cross multiply
    13,189.20x = 18,205.20 × 10,856.40
  4. Step 4: Simplify right side
    13,189.20x = 197,642,933.28
  5. Step 5: Solve for x
    x = 197,642,933.28/13,189.20
  6. Step 6: Final answer
    x = 14,985.21

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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.