Home / 15,389.57-21,237.80-8,675.20

Finding the Fourth Proportional to 15,389.57, 21,237.80 and 8,675.20

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Solution

The fourth proportional to 15,389.57, 21,237.80 and 8,675.20 is: 11,971.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.57 : 21,237.80 = 8,675.20 : x
  2. Step 2: Convert to fraction form
    15,389.57/21,237.80 = 8,675.20/x
  3. Step 3: Cross multiply
    15,389.57x = 21,237.80 × 8,675.20
  4. Step 4: Simplify right side
    15,389.57x = 184,242,145.73
  5. Step 5: Solve for x
    x = 184,242,145.73/15,389.57
  6. Step 6: Final answer
    x = 11,971.88

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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.