Home / 28,506.57-39,339.12-15,931.32

Finding the Fourth Proportional to 28,506.57, 39,339.12 and 15,931.32

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Solution

The fourth proportional to 28,506.57, 39,339.12 and 15,931.32 is: 21,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,506.57 : 39,339.12 = 15,931.32 : x
  2. Step 2: Convert to fraction form
    28,506.57/39,339.12 = 15,931.32/x
  3. Step 3: Cross multiply
    28,506.57x = 39,339.12 × 15,931.32
  4. Step 4: Simplify right side
    28,506.57x = 626,723,912.54
  5. Step 5: Solve for x
    x = 626,723,912.54/28,506.57
  6. Step 6: Final answer
    x = 21,985.25

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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.