Home / 30,839.12-42,547.52-20,079.08

Finding the Fourth Proportional to 30,839.12, 42,547.52 and 20,079.08

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Solution

The fourth proportional to 30,839.12, 42,547.52 and 20,079.08 is: 27,702.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,839.12 : 42,547.52 = 20,079.08 : x
  2. Step 2: Convert to fraction form
    30,839.12/42,547.52 = 20,079.08/x
  3. Step 3: Cross multiply
    30,839.12x = 42,547.52 × 20,079.08
  4. Step 4: Simplify right side
    30,839.12x = 854,315,057.88
  5. Step 5: Solve for x
    x = 854,315,057.88/30,839.12
  6. Step 6: Final answer
    x = 27,702.32

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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.