Home / 20,515.16-28,320.38-12,016.10

Finding the Fourth Proportional to 20,515.16, 28,320.38 and 12,016.10

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Solution

The fourth proportional to 20,515.16, 28,320.38 and 12,016.10 is: 16,587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.16 : 28,320.38 = 12,016.10 : x
  2. Step 2: Convert to fraction form
    20,515.16/28,320.38 = 12,016.10/x
  3. Step 3: Cross multiply
    20,515.16x = 28,320.38 × 12,016.10
  4. Step 4: Simplify right side
    20,515.16x = 340,300,518.12
  5. Step 5: Solve for x
    x = 340,300,518.12/20,515.16
  6. Step 6: Final answer
    x = 16,587.76

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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.