Home / 15,230.09-21,017.47-8,515.70

Finding the Fourth Proportional to 15,230.09, 21,017.47 and 8,515.70

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Solution

The fourth proportional to 15,230.09, 21,017.47 and 8,515.70 is: 11,751.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,230.09 : 21,017.47 = 8,515.70 : x
  2. Step 2: Convert to fraction form
    15,230.09/21,017.47 = 8,515.70/x
  3. Step 3: Cross multiply
    15,230.09x = 21,017.47 × 8,515.70
  4. Step 4: Simplify right side
    15,230.09x = 178,978,347.89
  5. Step 5: Solve for x
    x = 178,978,347.89/15,230.09
  6. Step 6: Final answer
    x = 11,751.63

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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.