Home / 28,420.83-42,618.29-13,636.71

Finding the Fourth Proportional to 28,420.83, 42,618.29 and 13,636.71

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Solution

The fourth proportional to 28,420.83, 42,618.29 and 13,636.71 is: 20,448.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.83 : 42,618.29 = 13,636.71 : x
  2. Step 2: Convert to fraction form
    28,420.83/42,618.29 = 13,636.71/x
  3. Step 3: Cross multiply
    28,420.83x = 42,618.29 × 13,636.71
  4. Step 4: Simplify right side
    28,420.83x = 581,173,193.24
  5. Step 5: Solve for x
    x = 581,173,193.24/28,420.83
  6. Step 6: Final answer
    x = 20,448.85

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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.