Home / 30,430.26-42,010.04-20,375.84

Finding the Fourth Proportional to 30,430.26, 42,010.04 and 20,375.84

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Solution

The fourth proportional to 30,430.26, 42,010.04 and 20,375.84 is: 28,129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,430.26 : 42,010.04 = 20,375.84 : x
  2. Step 2: Convert to fraction form
    30,430.26/42,010.04 = 20,375.84/x
  3. Step 3: Cross multiply
    30,430.26x = 42,010.04 × 20,375.84
  4. Step 4: Simplify right side
    30,430.26x = 855,989,541.50
  5. Step 5: Solve for x
    x = 855,989,541.50/30,430.26
  6. Step 6: Final answer
    x = 28,129.55

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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.