Home / 21,900.78-32,840.64-15,330.06

Finding the Fourth Proportional to 21,900.78, 32,840.64 and 15,330.06

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Solution

The fourth proportional to 21,900.78, 32,840.64 and 15,330.06 is: 22,987.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.78 : 32,840.64 = 15,330.06 : x
  2. Step 2: Convert to fraction form
    21,900.78/32,840.64 = 15,330.06/x
  3. Step 3: Cross multiply
    21,900.78x = 32,840.64 × 15,330.06
  4. Step 4: Simplify right side
    21,900.78x = 503,448,981.64
  5. Step 5: Solve for x
    x = 503,448,981.64/21,900.78
  6. Step 6: Final answer
    x = 22,987.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.