Home / 13,655.16-20,490.69-5,757.18

Finding the Fourth Proportional to 13,655.16, 20,490.69 and 5,757.18

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Solution

The fourth proportional to 13,655.16, 20,490.69 and 5,757.18 is: 8,639.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.16 : 20,490.69 = 5,757.18 : x
  2. Step 2: Convert to fraction form
    13,655.16/20,490.69 = 5,757.18/x
  3. Step 3: Cross multiply
    13,655.16x = 20,490.69 × 5,757.18
  4. Step 4: Simplify right side
    13,655.16x = 117,968,590.65
  5. Step 5: Solve for x
    x = 117,968,590.65/13,655.16
  6. Step 6: Final answer
    x = 8,639.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.