Home / 21,430.81-29,571.92-12,476.87

Finding the Fourth Proportional to 21,430.81, 29,571.92 and 12,476.87

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Solution

The fourth proportional to 21,430.81, 29,571.92 and 12,476.87 is: 17,216.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.81 : 29,571.92 = 12,476.87 : x
  2. Step 2: Convert to fraction form
    21,430.81/29,571.92 = 12,476.87/x
  3. Step 3: Cross multiply
    21,430.81x = 29,571.92 × 12,476.87
  4. Step 4: Simplify right side
    21,430.81x = 368,964,948.93
  5. Step 5: Solve for x
    x = 368,964,948.93/21,430.81
  6. Step 6: Final answer
    x = 17,216.56

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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.