Home / 20,842.90-31,271.56-9,154.42

Finding the Fourth Proportional to 20,842.90, 31,271.56 and 9,154.42

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Solution

The fourth proportional to 20,842.90, 31,271.56 and 9,154.42 is: 13,734.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.90 : 31,271.56 = 9,154.42 : x
  2. Step 2: Convert to fraction form
    20,842.90/31,271.56 = 9,154.42/x
  3. Step 3: Cross multiply
    20,842.90x = 31,271.56 × 9,154.42
  4. Step 4: Simplify right side
    20,842.90x = 286,272,994.30
  5. Step 5: Solve for x
    x = 286,272,994.30/20,842.90
  6. Step 6: Final answer
    x = 13,734.80

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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.