Home / 30,948.59-42,730.32-20,891.12

Finding the Fourth Proportional to 30,948.59, 42,730.32 and 20,891.12

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Solution

The fourth proportional to 30,948.59, 42,730.32 and 20,891.12 is: 28,844.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948.59 : 42,730.32 = 20,891.12 : x
  2. Step 2: Convert to fraction form
    30,948.59/42,730.32 = 20,891.12/x
  3. Step 3: Cross multiply
    30,948.59x = 42,730.32 × 20,891.12
  4. Step 4: Simplify right side
    30,948.59x = 892,684,242.76
  5. Step 5: Solve for x
    x = 892,684,242.76/30,948.59
  6. Step 6: Final answer
    x = 28,844.10

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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.