Home / 20,710.40-31,069.02-8,230.50

Finding the Fourth Proportional to 20,710.40, 31,069.02 and 8,230.50

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Solution

The fourth proportional to 20,710.40, 31,069.02 and 8,230.50 is: 12,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.40 : 31,069.02 = 8,230.50 : x
  2. Step 2: Convert to fraction form
    20,710.40/31,069.02 = 8,230.50/x
  3. Step 3: Cross multiply
    20,710.40x = 31,069.02 × 8,230.50
  4. Step 4: Simplify right side
    20,710.40x = 255,713,569.11
  5. Step 5: Solve for x
    x = 255,713,569.11/20,710.40
  6. Step 6: Final answer
    x = 12,347.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.