Home / 30,966.86-42,752.00-20,387.25

Finding the Fourth Proportional to 30,966.86, 42,752.00 and 20,387.25

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Solution

The fourth proportional to 30,966.86, 42,752.00 and 20,387.25 is: 28,146.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.86 : 42,752.00 = 20,387.25 : x
  2. Step 2: Convert to fraction form
    30,966.86/42,752.00 = 20,387.25/x
  3. Step 3: Cross multiply
    30,966.86x = 42,752.00 × 20,387.25
  4. Step 4: Simplify right side
    30,966.86x = 871,595,762.97
  5. Step 5: Solve for x
    x = 871,595,762.97/30,966.86
  6. Step 6: Final answer
    x = 28,146.08

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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.