Home / 30,895.02-42,612.48-20,280.78

Finding the Fourth Proportional to 30,895.02, 42,612.48 and 20,280.78

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Solution

The fourth proportional to 30,895.02, 42,612.48 and 20,280.78 is: 27,972.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,895.02 : 42,612.48 = 20,280.78 : x
  2. Step 2: Convert to fraction form
    30,895.02/42,612.48 = 20,280.78/x
  3. Step 3: Cross multiply
    30,895.02x = 42,612.48 × 20,280.78
  4. Step 4: Simplify right side
    30,895.02x = 864,214,332.13
  5. Step 5: Solve for x
    x = 864,214,332.13/30,895.02
  6. Step 6: Final answer
    x = 27,972.61

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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.