Home / 28,467.78-39,284.91-15,720.18

Finding the Fourth Proportional to 28,467.78, 39,284.91 and 15,720.18

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Solution

The fourth proportional to 28,467.78, 39,284.91 and 15,720.18 is: 21,693.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,467.78 : 39,284.91 = 15,720.18 : x
  2. Step 2: Convert to fraction form
    28,467.78/39,284.91 = 15,720.18/x
  3. Step 3: Cross multiply
    28,467.78x = 39,284.91 × 15,720.18
  4. Step 4: Simplify right side
    28,467.78x = 617,565,856.48
  5. Step 5: Solve for x
    x = 617,565,856.48/28,467.78
  6. Step 6: Final answer
    x = 21,693.50

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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.