Home / 10,521.51-15,781.05-3,125.94

Finding the Fourth Proportional to 10,521.51, 15,781.05 and 3,125.94

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Solution

The fourth proportional to 10,521.51, 15,781.05 and 3,125.94 is: 4,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.51 : 15,781.05 = 3,125.94 : x
  2. Step 2: Convert to fraction form
    10,521.51/15,781.05 = 3,125.94/x
  3. Step 3: Cross multiply
    10,521.51x = 15,781.05 × 3,125.94
  4. Step 4: Simplify right side
    10,521.51x = 49,330,615.44
  5. Step 5: Solve for x
    x = 49,330,615.44/10,521.51
  6. Step 6: Final answer
    x = 4,688.55

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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.