Home / 21,287.04-31,907.88-10,186.80

Finding the Fourth Proportional to 21,287.04, 31,907.88 and 10,186.80

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Solution

The fourth proportional to 21,287.04, 31,907.88 and 10,186.80 is: 15,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.04 : 31,907.88 = 10,186.80 : x
  2. Step 2: Convert to fraction form
    21,287.04/31,907.88 = 10,186.80/x
  3. Step 3: Cross multiply
    21,287.04x = 31,907.88 × 10,186.80
  4. Step 4: Simplify right side
    21,287.04x = 325,039,191.98
  5. Step 5: Solve for x
    x = 325,039,191.98/21,287.04
  6. Step 6: Final answer
    x = 15,269.35

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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.