Home / 28,587.30-42,928.47-19,287.15

Finding the Fourth Proportional to 28,587.30, 42,928.47 and 19,287.15

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Solution

The fourth proportional to 28,587.30, 42,928.47 and 19,287.15 is: 28,962.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.30 : 42,928.47 = 19,287.15 : x
  2. Step 2: Convert to fraction form
    28,587.30/42,928.47 = 19,287.15/x
  3. Step 3: Cross multiply
    28,587.30x = 42,928.47 × 19,287.15
  4. Step 4: Simplify right side
    28,587.30x = 827,967,840.16
  5. Step 5: Solve for x
    x = 827,967,840.16/28,587.30
  6. Step 6: Final answer
    x = 28,962.79

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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.