Home / 15,216.86-21,002.77-9,902.45

Finding the Fourth Proportional to 15,216.86, 21,002.77 and 9,902.45

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Solution

The fourth proportional to 15,216.86, 21,002.77 and 9,902.45 is: 13,667.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.86 : 21,002.77 = 9,902.45 : x
  2. Step 2: Convert to fraction form
    15,216.86/21,002.77 = 9,902.45/x
  3. Step 3: Cross multiply
    15,216.86x = 21,002.77 × 9,902.45
  4. Step 4: Simplify right side
    15,216.86x = 207,978,750.02
  5. Step 5: Solve for x
    x = 207,978,750.02/15,216.86
  6. Step 6: Final answer
    x = 13,667.66

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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.