Home / 13,578.95-20,368.49-4,218.77

Finding the Fourth Proportional to 13,578.95, 20,368.49 and 4,218.77

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Solution

The fourth proportional to 13,578.95, 20,368.49 and 4,218.77 is: 6,328.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.95 : 20,368.49 = 4,218.77 : x
  2. Step 2: Convert to fraction form
    13,578.95/20,368.49 = 4,218.77/x
  3. Step 3: Cross multiply
    13,578.95x = 20,368.49 × 4,218.77
  4. Step 4: Simplify right side
    13,578.95x = 85,929,851.62
  5. Step 5: Solve for x
    x = 85,929,851.62/13,578.95
  6. Step 6: Final answer
    x = 6,328.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.