Home / 28,185.72-42,281.43-10,421.13

Finding the Fourth Proportional to 28,185.72, 42,281.43 and 10,421.13

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Solution

The fourth proportional to 28,185.72, 42,281.43 and 10,421.13 is: 15,632.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.72 : 42,281.43 = 10,421.13 : x
  2. Step 2: Convert to fraction form
    28,185.72/42,281.43 = 10,421.13/x
  3. Step 3: Cross multiply
    28,185.72x = 42,281.43 × 10,421.13
  4. Step 4: Simplify right side
    28,185.72x = 440,620,323.14
  5. Step 5: Solve for x
    x = 440,620,323.14/28,185.72
  6. Step 6: Final answer
    x = 15,632.75

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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.