Home / 30,894.20-42,669.02-20,805.10

Finding the Fourth Proportional to 30,894.20, 42,669.02 and 20,805.10

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Solution

The fourth proportional to 30,894.20, 42,669.02 and 20,805.10 is: 28,734.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,894.20 : 42,669.02 = 20,805.10 : x
  2. Step 2: Convert to fraction form
    30,894.20/42,669.02 = 20,805.10/x
  3. Step 3: Cross multiply
    30,894.20x = 42,669.02 × 20,805.10
  4. Step 4: Simplify right side
    30,894.20x = 887,733,228.00
  5. Step 5: Solve for x
    x = 887,733,228.00/30,894.20
  6. Step 6: Final answer
    x = 28,734.62

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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.