Home / 20,970.84-31,451.42-9,885.24

Finding the Fourth Proportional to 20,970.84, 31,451.42 and 9,885.24

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Solution

The fourth proportional to 20,970.84, 31,451.42 and 9,885.24 is: 14,825.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.84 : 31,451.42 = 9,885.24 : x
  2. Step 2: Convert to fraction form
    20,970.84/31,451.42 = 9,885.24/x
  3. Step 3: Cross multiply
    20,970.84x = 31,451.42 × 9,885.24
  4. Step 4: Simplify right side
    20,970.84x = 310,904,835.04
  5. Step 5: Solve for x
    x = 310,904,835.04/20,970.84
  6. Step 6: Final answer
    x = 14,825.58

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1.5x scale

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.