Home / 28,506.25-39,339.84-15,931

Finding the Fourth Proportional to 28,506.25, 39,339.84 and 15,931

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Solution

The fourth proportional to 28,506.25, 39,339.84 and 15,931 is: 21,985.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,506.25 : 39,339.84 = 15,931 : x
  2. Step 2: Convert to fraction form
    28,506.25/39,339.84 = 15,931/x
  3. Step 3: Cross multiply
    28,506.25x = 39,339.84 × 15,931
  4. Step 4: Simplify right side
    28,506.25x = 626,722,991.04
  5. Step 5: Solve for x
    x = 626,722,991.04/28,506.25
  6. Step 6: Final answer
    x = 21,985.46

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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.