Home / 21,971.47-30,320.66-11,899.93

Finding the Fourth Proportional to 21,971.47, 30,320.66 and 11,899.93

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Solution

The fourth proportional to 21,971.47, 30,320.66 and 11,899.93 is: 16,421.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.47 : 30,320.66 = 11,899.93 : x
  2. Step 2: Convert to fraction form
    21,971.47/30,320.66 = 11,899.93/x
  3. Step 3: Cross multiply
    21,971.47x = 30,320.66 × 11,899.93
  4. Step 4: Simplify right side
    21,971.47x = 360,813,731.55
  5. Step 5: Solve for x
    x = 360,813,731.55/21,971.47
  6. Step 6: Final answer
    x = 16,421.92

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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.