Home / 28,520.62-39,302.94-20,547.79

Finding the Fourth Proportional to 28,520.62, 39,302.94 and 20,547.79

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Solution

The fourth proportional to 28,520.62, 39,302.94 and 20,547.79 is: 28,315.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.62 : 39,302.94 = 20,547.79 : x
  2. Step 2: Convert to fraction form
    28,520.62/39,302.94 = 20,547.79/x
  3. Step 3: Cross multiply
    28,520.62x = 39,302.94 × 20,547.79
  4. Step 4: Simplify right side
    28,520.62x = 807,588,360.99
  5. Step 5: Solve for x
    x = 807,588,360.99/28,520.62
  6. Step 6: Final answer
    x = 28,315.95

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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.