Home / 20,924.84-28,869.32-12,429.56

Finding the Fourth Proportional to 20,924.84, 28,869.32 and 12,429.56

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Solution

The fourth proportional to 20,924.84, 28,869.32 and 12,429.56 is: 17,148.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.84 : 28,869.32 = 12,429.56 : x
  2. Step 2: Convert to fraction form
    20,924.84/28,869.32 = 12,429.56/x
  3. Step 3: Cross multiply
    20,924.84x = 28,869.32 × 12,429.56
  4. Step 4: Simplify right side
    20,924.84x = 358,832,945.10
  5. Step 5: Solve for x
    x = 358,832,945.10/20,924.84
  6. Step 6: Final answer
    x = 17,148.66

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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.