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Finding the Fourth Proportional to 19,981.60, 29,919.60 and 16,014.40

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Solution

The fourth proportional to 19,981.60, 29,919.60 and 16,014.40 is: 23,979.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.60 : 29,919.60 = 16,014.40 : x
  2. Step 2: Convert to fraction form
    19,981.60/29,919.60 = 16,014.40/x
  3. Step 3: Cross multiply
    19,981.60x = 29,919.60 × 16,014.40
  4. Step 4: Simplify right side
    19,981.60x = 479,144,442.24
  5. Step 5: Solve for x
    x = 479,144,442.24/19,981.60
  6. Step 6: Final answer
    x = 23,979.28

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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.