Home / 28,386.96-39,173.16-15,811.44

Finding the Fourth Proportional to 28,386.96, 39,173.16 and 15,811.44

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Solution

The fourth proportional to 28,386.96, 39,173.16 and 15,811.44 is: 21,819.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,386.96 : 39,173.16 = 15,811.44 : x
  2. Step 2: Convert to fraction form
    28,386.96/39,173.16 = 15,811.44/x
  3. Step 3: Cross multiply
    28,386.96x = 39,173.16 × 15,811.44
  4. Step 4: Simplify right side
    28,386.96x = 619,384,068.95
  5. Step 5: Solve for x
    x = 619,384,068.95/28,386.96
  6. Step 6: Final answer
    x = 21,819.32

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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.