Home / 20,710.07-28,578.53-12,211.78

Finding the Fourth Proportional to 20,710.07, 28,578.53 and 12,211.78

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Solution

The fourth proportional to 20,710.07, 28,578.53 and 12,211.78 is: 16,851.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.07 : 28,578.53 = 12,211.78 : x
  2. Step 2: Convert to fraction form
    20,710.07/28,578.53 = 12,211.78/x
  3. Step 3: Cross multiply
    20,710.07x = 28,578.53 × 12,211.78
  4. Step 4: Simplify right side
    20,710.07x = 348,994,641.93
  5. Step 5: Solve for x
    x = 348,994,641.93/20,710.07
  6. Step 6: Final answer
    x = 16,851.45

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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.