Home / 13,521.56-18,655.62-10,689.44

Finding the Fourth Proportional to 13,521.56, 18,655.62 and 10,689.44

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Solution

The fourth proportional to 13,521.56, 18,655.62 and 10,689.44 is: 14,748.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.56 : 18,655.62 = 10,689.44 : x
  2. Step 2: Convert to fraction form
    13,521.56/18,655.62 = 10,689.44/x
  3. Step 3: Cross multiply
    13,521.56x = 18,655.62 × 10,689.44
  4. Step 4: Simplify right side
    13,521.56x = 199,418,130.65
  5. Step 5: Solve for x
    x = 199,418,130.65/13,521.56
  6. Step 6: Final answer
    x = 14,748.16

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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.