Home / 28,310.16-39,068.77-15,390.30

Finding the Fourth Proportional to 28,310.16, 39,068.77 and 15,390.30

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Solution

The fourth proportional to 28,310.16, 39,068.77 and 15,390.30 is: 21,239.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,310.16 : 39,068.77 = 15,390.30 : x
  2. Step 2: Convert to fraction form
    28,310.16/39,068.77 = 15,390.30/x
  3. Step 3: Cross multiply
    28,310.16x = 39,068.77 × 15,390.30
  4. Step 4: Simplify right side
    28,310.16x = 601,280,090.93
  5. Step 5: Solve for x
    x = 601,280,090.93/28,310.16
  6. Step 6: Final answer
    x = 21,239.02

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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.