Home / 21,862.81-30,169.50-12,430.75

Finding the Fourth Proportional to 21,862.81, 30,169.50 and 12,430.75

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Solution

The fourth proportional to 21,862.81, 30,169.50 and 12,430.75 is: 17,153.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.81 : 30,169.50 = 12,430.75 : x
  2. Step 2: Convert to fraction form
    21,862.81/30,169.50 = 12,430.75/x
  3. Step 3: Cross multiply
    21,862.81x = 30,169.50 × 12,430.75
  4. Step 4: Simplify right side
    21,862.81x = 375,029,512.13
  5. Step 5: Solve for x
    x = 375,029,512.13/21,862.81
  6. Step 6: Final answer
    x = 17,153.77

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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.