Home / 21,970.13-30,318.75-11,898.59

Finding the Fourth Proportional to 21,970.13, 30,318.75 and 11,898.59

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Solution

The fourth proportional to 21,970.13, 30,318.75 and 11,898.59 is: 16,420.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.13 : 30,318.75 = 11,898.59 : x
  2. Step 2: Convert to fraction form
    21,970.13/30,318.75 = 11,898.59/x
  3. Step 3: Cross multiply
    21,970.13x = 30,318.75 × 11,898.59
  4. Step 4: Simplify right side
    21,970.13x = 360,750,223.97
  5. Step 5: Solve for x
    x = 360,750,223.97/21,970.13
  6. Step 6: Final answer
    x = 16,420.04

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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.