Home / 20,547.70-28,354.21-12,588.84

Finding the Fourth Proportional to 20,547.70, 28,354.21 and 12,588.84

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Solution

The fourth proportional to 20,547.70, 28,354.21 and 12,588.84 is: 17,371.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.70 : 28,354.21 = 12,588.84 : x
  2. Step 2: Convert to fraction form
    20,547.70/28,354.21 = 12,588.84/x
  3. Step 3: Cross multiply
    20,547.70x = 28,354.21 × 12,588.84
  4. Step 4: Simplify right side
    20,547.70x = 356,946,581.54
  5. Step 5: Solve for x
    x = 356,946,581.54/20,547.70
  6. Step 6: Final answer
    x = 17,371.61

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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.