Home / 20,587.84-28,411.04-11,156.48

Finding the Fourth Proportional to 20,587.84, 28,411.04 and 11,156.48

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Solution

The fourth proportional to 20,587.84, 28,411.04 and 11,156.48 is: 15,395.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.84 : 28,411.04 = 11,156.48 : x
  2. Step 2: Convert to fraction form
    20,587.84/28,411.04 = 11,156.48/x
  3. Step 3: Cross multiply
    20,587.84x = 28,411.04 × 11,156.48
  4. Step 4: Simplify right side
    20,587.84x = 316,967,199.54
  5. Step 5: Solve for x
    x = 316,967,199.54/20,587.84
  6. Step 6: Final answer
    x = 15,395.85

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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.