Home / 20,648.81-28,492.93-12,149.06

Finding the Fourth Proportional to 20,648.81, 28,492.93 and 12,149.06

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Solution

The fourth proportional to 20,648.81, 28,492.93 and 12,149.06 is: 16,764.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.81 : 28,492.93 = 12,149.06 : x
  2. Step 2: Convert to fraction form
    20,648.81/28,492.93 = 12,149.06/x
  3. Step 3: Cross multiply
    20,648.81x = 28,492.93 × 12,149.06
  4. Step 4: Simplify right side
    20,648.81x = 346,162,244.91
  5. Step 5: Solve for x
    x = 346,162,244.91/20,648.81
  6. Step 6: Final answer
    x = 16,764.27

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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.