Home / 20,918.24-28,870.08-12,962.72

Finding the Fourth Proportional to 20,918.24, 28,870.08 and 12,962.72

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Solution

The fourth proportional to 20,918.24, 28,870.08 and 12,962.72 is: 17,890.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.24 : 28,870.08 = 12,962.72 : x
  2. Step 2: Convert to fraction form
    20,918.24/28,870.08 = 12,962.72/x
  3. Step 3: Cross multiply
    20,918.24x = 28,870.08 × 12,962.72
  4. Step 4: Simplify right side
    20,918.24x = 374,234,763.42
  5. Step 5: Solve for x
    x = 374,234,763.42/20,918.24
  6. Step 6: Final answer
    x = 17,890.36

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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.