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Finding the Fourth Proportional to 35,402.60, 48,838.50 and 21,989.45

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Solution

The fourth proportional to 35,402.60, 48,838.50 and 21,989.45 is: 30,334.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,402.60 : 48,838.50 = 21,989.45 : x
  2. Step 2: Convert to fraction form
    35,402.60/48,838.50 = 21,989.45/x
  3. Step 3: Cross multiply
    35,402.60x = 48,838.50 × 21,989.45
  4. Step 4: Simplify right side
    35,402.60x = 1,073,931,509.63
  5. Step 5: Solve for x
    x = 1,073,931,509.63/35,402.60
  6. Step 6: Final answer
    x = 30,334.82

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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.