Home / 28,310.68-39,069.24-15,564.40

Finding the Fourth Proportional to 28,310.68, 39,069.24 and 15,564.40

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Solution

The fourth proportional to 28,310.68, 39,069.24 and 15,564.40 is: 21,479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,310.68 : 39,069.24 = 15,564.40 : x
  2. Step 2: Convert to fraction form
    28,310.68/39,069.24 = 15,564.40/x
  3. Step 3: Cross multiply
    28,310.68x = 39,069.24 × 15,564.40
  4. Step 4: Simplify right side
    28,310.68x = 608,089,279.06
  5. Step 5: Solve for x
    x = 608,089,279.06/28,310.68
  6. Step 6: Final answer
    x = 21,479.15

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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.