Home / 86,621.63-129,932.44-20,957.63

Finding the Fourth Proportional to 86,621.63, 129,932.44 and 20,957.63

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Solution

The fourth proportional to 86,621.63, 129,932.44 and 20,957.63 is: 31,436.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,621.63 : 129,932.44 = 20,957.63 : x
  2. Step 2: Convert to fraction form
    86,621.63/129,932.44 = 20,957.63/x
  3. Step 3: Cross multiply
    86,621.63x = 129,932.44 × 20,957.63
  4. Step 4: Simplify right side
    86,621.63x = 2,723,075,300.46
  5. Step 5: Solve for x
    x = 2,723,075,300.46/86,621.63
  6. Step 6: Final answer
    x = 31,436.44

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.