Home / 28,454.08-39,268.16-15,878.72

Finding the Fourth Proportional to 28,454.08, 39,268.16 and 15,878.72

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Solution

The fourth proportional to 28,454.08, 39,268.16 and 15,878.72 is: 21,913.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.08 : 39,268.16 = 15,878.72 : x
  2. Step 2: Convert to fraction form
    28,454.08/39,268.16 = 15,878.72/x
  3. Step 3: Cross multiply
    28,454.08x = 39,268.16 × 15,878.72
  4. Step 4: Simplify right side
    28,454.08x = 623,528,117.56
  5. Step 5: Solve for x
    x = 623,528,117.56/28,454.08
  6. Step 6: Final answer
    x = 21,913.49

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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.