Home / 21,065.11-31,573.36-7,909.09

Finding the Fourth Proportional to 21,065.11, 31,573.36 and 7,909.09

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Solution

The fourth proportional to 21,065.11, 31,573.36 and 7,909.09 is: 11,854.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.11 : 31,573.36 = 7,909.09 : x
  2. Step 2: Convert to fraction form
    21,065.11/31,573.36 = 7,909.09/x
  3. Step 3: Cross multiply
    21,065.11x = 31,573.36 × 7,909.09
  4. Step 4: Simplify right side
    21,065.11x = 249,716,545.84
  5. Step 5: Solve for x
    x = 249,716,545.84/21,065.11
  6. Step 6: Final answer
    x = 11,854.51

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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.