Home / 13,538.13-18,688.08-11,642.05

Finding the Fourth Proportional to 13,538.13, 18,688.08 and 11,642.05

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Solution

The fourth proportional to 13,538.13, 18,688.08 and 11,642.05 is: 16,070.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,538.13 : 18,688.08 = 11,642.05 : x
  2. Step 2: Convert to fraction form
    13,538.13/18,688.08 = 11,642.05/x
  3. Step 3: Cross multiply
    13,538.13x = 18,688.08 × 11,642.05
  4. Step 4: Simplify right side
    13,538.13x = 217,567,561.76
  5. Step 5: Solve for x
    x = 217,567,561.76/13,538.13
  6. Step 6: Final answer
    x = 16,070.72

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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.