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Finding the Fourth Proportional to 23,987.40, 35,935.20 and 12,890.40

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Solution

The fourth proportional to 23,987.40, 35,935.20 and 12,890.40 is: 19,310.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,987.40 : 35,935.20 = 12,890.40 : x
  2. Step 2: Convert to fraction form
    23,987.40/35,935.20 = 12,890.40/x
  3. Step 3: Cross multiply
    23,987.40x = 35,935.20 × 12,890.40
  4. Step 4: Simplify right side
    23,987.40x = 463,219,102.08
  5. Step 5: Solve for x
    x = 463,219,102.08/23,987.40
  6. Step 6: Final answer
    x = 19,310.93

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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.