Home / 20,875.16-31,298.88-11,519.66

Finding the Fourth Proportional to 20,875.16, 31,298.88 and 11,519.66

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Solution

The fourth proportional to 20,875.16, 31,298.88 and 11,519.66 is: 17,271.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.16 : 31,298.88 = 11,519.66 : x
  2. Step 2: Convert to fraction form
    20,875.16/31,298.88 = 11,519.66/x
  3. Step 3: Cross multiply
    20,875.16x = 31,298.88 × 11,519.66
  4. Step 4: Simplify right side
    20,875.16x = 360,552,455.98
  5. Step 5: Solve for x
    x = 360,552,455.98/20,875.16
  6. Step 6: Final answer
    x = 17,271.84

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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.