Home / 21,487.76-32,176.56-12,728.96

Finding the Fourth Proportional to 21,487.76, 32,176.56 and 12,728.96

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Solution

The fourth proportional to 21,487.76, 32,176.56 and 12,728.96 is: 19,060.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.76 : 32,176.56 = 12,728.96 : x
  2. Step 2: Convert to fraction form
    21,487.76/32,176.56 = 12,728.96/x
  3. Step 3: Cross multiply
    21,487.76x = 32,176.56 × 12,728.96
  4. Step 4: Simplify right side
    21,487.76x = 409,574,145.18
  5. Step 5: Solve for x
    x = 409,574,145.18/21,487.76
  6. Step 6: Final answer
    x = 19,060.81

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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.