Home / 15,685.40-21,645.76-8,515.46

Finding the Fourth Proportional to 15,685.40, 21,645.76 and 8,515.46

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Solution

The fourth proportional to 15,685.40, 21,645.76 and 8,515.46 is: 11,751.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.40 : 21,645.76 = 8,515.46 : x
  2. Step 2: Convert to fraction form
    15,685.40/21,645.76 = 8,515.46/x
  3. Step 3: Cross multiply
    15,685.40x = 21,645.76 × 8,515.46
  4. Step 4: Simplify right side
    15,685.40x = 184,323,452.64
  5. Step 5: Solve for x
    x = 184,323,452.64/15,685.40
  6. Step 6: Final answer
    x = 11,751.28

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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.