Home / 13,101.91-18,077.67-10,985.99

Finding the Fourth Proportional to 13,101.91, 18,077.67 and 10,985.99

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Solution

The fourth proportional to 13,101.91, 18,077.67 and 10,985.99 is: 15,158.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.91 : 18,077.67 = 10,985.99 : x
  2. Step 2: Convert to fraction form
    13,101.91/18,077.67 = 10,985.99/x
  3. Step 3: Cross multiply
    13,101.91x = 18,077.67 × 10,985.99
  4. Step 4: Simplify right side
    13,101.91x = 198,601,011.45
  5. Step 5: Solve for x
    x = 198,601,011.45/13,101.91
  6. Step 6: Final answer
    x = 15,158.18

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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.