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Finding the Fourth Proportional to 35,503.61, 48,979.62 and 20,392.81

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Solution

The fourth proportional to 35,503.61, 48,979.62 and 20,392.81 is: 28,133.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,503.61 : 48,979.62 = 20,392.81 : x
  2. Step 2: Convert to fraction form
    35,503.61/48,979.62 = 20,392.81/x
  3. Step 3: Cross multiply
    35,503.61x = 48,979.62 × 20,392.81
  4. Step 4: Simplify right side
    35,503.61x = 998,831,839.63
  5. Step 5: Solve for x
    x = 998,831,839.63/35,503.61
  6. Step 6: Final answer
    x = 28,133.25

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1.5x scale

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.