Home / 15,145.14-20,899.24-9,479.64

Finding the Fourth Proportional to 15,145.14, 20,899.24 and 9,479.64

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Solution

The fourth proportional to 15,145.14, 20,899.24 and 9,479.64 is: 13,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.14 : 20,899.24 = 9,479.64 : x
  2. Step 2: Convert to fraction form
    15,145.14/20,899.24 = 9,479.64/x
  3. Step 3: Cross multiply
    15,145.14x = 20,899.24 × 9,479.64
  4. Step 4: Simplify right side
    15,145.14x = 198,117,271.47
  5. Step 5: Solve for x
    x = 198,117,271.47/15,145.14
  6. Step 6: Final answer
    x = 13,081.24

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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.