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Finding the Fourth Proportional to 19,803.88, 29,582.69 and 15,915.88

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Solution

The fourth proportional to 19,803.88, 29,582.69 and 15,915.88 is: 23,774.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,803.88 : 29,582.69 = 15,915.88 : x
  2. Step 2: Convert to fraction form
    19,803.88/29,582.69 = 15,915.88/x
  3. Step 3: Cross multiply
    19,803.88x = 29,582.69 × 15,915.88
  4. Step 4: Simplify right side
    19,803.88x = 470,834,544.12
  5. Step 5: Solve for x
    x = 470,834,544.12/19,803.88
  6. Step 6: Final answer
    x = 23,774.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.