Home / 21,009.68-31,513.40-7,860.95

Finding the Fourth Proportional to 21,009.68, 31,513.40 and 7,860.95

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Solution

The fourth proportional to 21,009.68, 31,513.40 and 7,860.95 is: 11,791.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.68 : 31,513.40 = 7,860.95 : x
  2. Step 2: Convert to fraction form
    21,009.68/31,513.40 = 7,860.95/x
  3. Step 3: Cross multiply
    21,009.68x = 31,513.40 × 7,860.95
  4. Step 4: Simplify right side
    21,009.68x = 247,725,064.86
  5. Step 5: Solve for x
    x = 247,725,064.86/21,009.68
  6. Step 6: Final answer
    x = 11,791.00

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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.