Home / 20,343.54-28,075.05-11,389.26

Finding the Fourth Proportional to 20,343.54, 28,075.05 and 11,389.26

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Solution

The fourth proportional to 20,343.54, 28,075.05 and 11,389.26 is: 15,717.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.54 : 28,075.05 = 11,389.26 : x
  2. Step 2: Convert to fraction form
    20,343.54/28,075.05 = 11,389.26/x
  3. Step 3: Cross multiply
    20,343.54x = 28,075.05 × 11,389.26
  4. Step 4: Simplify right side
    20,343.54x = 319,754,043.96
  5. Step 5: Solve for x
    x = 319,754,043.96/20,343.54
  6. Step 6: Final answer
    x = 15,717.72

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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.