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Finding the Fourth Proportional to 32,970.79, 45,520.68 and 21,660.40

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Solution

The fourth proportional to 32,970.79, 45,520.68 and 21,660.40 is: 29,905.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,970.79 : 45,520.68 = 21,660.40 : x
  2. Step 2: Convert to fraction form
    32,970.79/45,520.68 = 21,660.40/x
  3. Step 3: Cross multiply
    32,970.79x = 45,520.68 × 21,660.40
  4. Step 4: Simplify right side
    32,970.79x = 985,996,137.07
  5. Step 5: Solve for x
    x = 985,996,137.07/32,970.79
  6. Step 6: Final answer
    x = 29,905.14

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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.