Home / 20,521.79-28,320.06-11,090.35

Finding the Fourth Proportional to 20,521.79, 28,320.06 and 11,090.35

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Solution

The fourth proportional to 20,521.79, 28,320.06 and 11,090.35 is: 15,304.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.79 : 28,320.06 = 11,090.35 : x
  2. Step 2: Convert to fraction form
    20,521.79/28,320.06 = 11,090.35/x
  3. Step 3: Cross multiply
    20,521.79x = 28,320.06 × 11,090.35
  4. Step 4: Simplify right side
    20,521.79x = 314,079,377.42
  5. Step 5: Solve for x
    x = 314,079,377.42/20,521.79
  6. Step 6: Final answer
    x = 15,304.68

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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.