Home / 31,030.83-42,821.73-18,285.21

Finding the Fourth Proportional to 31,030.83, 42,821.73 and 18,285.21

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Solution

The fourth proportional to 31,030.83, 42,821.73 and 18,285.21 is: 25,233.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,030.83 : 42,821.73 = 18,285.21 : x
  2. Step 2: Convert to fraction form
    31,030.83/42,821.73 = 18,285.21/x
  3. Step 3: Cross multiply
    31,030.83x = 42,821.73 × 18,285.21
  4. Step 4: Simplify right side
    31,030.83x = 783,004,325.61
  5. Step 5: Solve for x
    x = 783,004,325.61/31,030.83
  6. Step 6: Final answer
    x = 25,233.11

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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.