Home / 30,421.67-42,001.16-20,877.53

Finding the Fourth Proportional to 30,421.67, 42,001.16 and 20,877.53

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Solution

The fourth proportional to 30,421.67, 42,001.16 and 20,877.53 is: 28,824.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,421.67 : 42,001.16 = 20,877.53 : x
  2. Step 2: Convert to fraction form
    30,421.67/42,001.16 = 20,877.53/x
  3. Step 3: Cross multiply
    30,421.67x = 42,001.16 × 20,877.53
  4. Step 4: Simplify right side
    30,421.67x = 876,880,163.54
  5. Step 5: Solve for x
    x = 876,880,163.54/30,421.67
  6. Step 6: Final answer
    x = 28,824.20

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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.