Home / 13,587.89-20,388.96-9,870.38

Finding the Fourth Proportional to 13,587.89, 20,388.96 and 9,870.38

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Solution

The fourth proportional to 13,587.89, 20,388.96 and 9,870.38 is: 14,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,587.89 : 20,388.96 = 9,870.38 : x
  2. Step 2: Convert to fraction form
    13,587.89/20,388.96 = 9,870.38/x
  3. Step 3: Cross multiply
    13,587.89x = 20,388.96 × 9,870.38
  4. Step 4: Simplify right side
    13,587.89x = 201,246,758.33
  5. Step 5: Solve for x
    x = 201,246,758.33/13,587.89
  6. Step 6: Final answer
    x = 14,810.75

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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.