Home / 20,343.43-28,075.61-11,391.76

Finding the Fourth Proportional to 20,343.43, 28,075.61 and 11,391.76

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Solution

The fourth proportional to 20,343.43, 28,075.61 and 11,391.76 is: 15,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.43 : 28,075.61 = 11,391.76 : x
  2. Step 2: Convert to fraction form
    20,343.43/28,075.61 = 11,391.76/x
  3. Step 3: Cross multiply
    20,343.43x = 28,075.61 × 11,391.76
  4. Step 4: Simplify right side
    20,343.43x = 319,830,753.51
  5. Step 5: Solve for x
    x = 319,830,753.51/20,343.43
  6. Step 6: Final answer
    x = 15,721.58

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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.