Home / 13,700.91-18,905.23-8,320.55

Finding the Fourth Proportional to 13,700.91, 18,905.23 and 8,320.55

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Solution

The fourth proportional to 13,700.91, 18,905.23 and 8,320.55 is: 11,481.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.91 : 18,905.23 = 8,320.55 : x
  2. Step 2: Convert to fraction form
    13,700.91/18,905.23 = 8,320.55/x
  3. Step 3: Cross multiply
    13,700.91x = 18,905.23 × 8,320.55
  4. Step 4: Simplify right side
    13,700.91x = 157,301,911.48
  5. Step 5: Solve for x
    x = 157,301,911.48/13,700.91
  6. Step 6: Final answer
    x = 11,481.13

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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.