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Finding the Fourth Proportional to 35,259, 48,657.42 and 20,355

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Solution

The fourth proportional to 35,259, 48,657.42 and 20,355 is: 28,089.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,259 : 48,657.42 = 20,355 : x
  2. Step 2: Convert to fraction form
    35,259/48,657.42 = 20,355/x
  3. Step 3: Cross multiply
    35,259x = 48,657.42 × 20,355
  4. Step 4: Simplify right side
    35,259x = 990,421,784.10
  5. Step 5: Solve for x
    x = 990,421,784.10/35,259
  6. Step 6: Final answer
    x = 28,089.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.