Home / 20,570.75-30,856.23-4,988.38

Finding the Fourth Proportional to 20,570.75, 30,856.23 and 4,988.38

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Solution

The fourth proportional to 20,570.75, 30,856.23 and 4,988.38 is: 7,482.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.75 : 30,856.23 = 4,988.38 : x
  2. Step 2: Convert to fraction form
    20,570.75/30,856.23 = 4,988.38/x
  3. Step 3: Cross multiply
    20,570.75x = 30,856.23 × 4,988.38
  4. Step 4: Simplify right side
    20,570.75x = 153,922,421.38
  5. Step 5: Solve for x
    x = 153,922,421.38/20,570.75
  6. Step 6: Final answer
    x = 7,482.59

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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.