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Finding the Fourth Proportional to 43,009.40, 64,416.90 and 25,513.40

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Solution

The fourth proportional to 43,009.40, 64,416.90 and 25,513.40 is: 38,212.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,009.40 : 64,416.90 = 25,513.40 : x
  2. Step 2: Convert to fraction form
    43,009.40/64,416.90 = 25,513.40/x
  3. Step 3: Cross multiply
    43,009.40x = 64,416.90 × 25,513.40
  4. Step 4: Simplify right side
    43,009.40x = 1,643,494,136.46
  5. Step 5: Solve for x
    x = 1,643,494,136.46/43,009.40
  6. Step 6: Final answer
    x = 38,212.44

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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.