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Finding the Fourth Proportional to 35,680.40, 53,528.70 and 20,881.70

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Solution

The fourth proportional to 35,680.40, 53,528.70 and 20,881.70 is: 31,327.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,680.40 : 53,528.70 = 20,881.70 : x
  2. Step 2: Convert to fraction form
    35,680.40/53,528.70 = 20,881.70/x
  3. Step 3: Cross multiply
    35,680.40x = 53,528.70 × 20,881.70
  4. Step 4: Simplify right side
    35,680.40x = 1,117,770,254.79
  5. Step 5: Solve for x
    x = 1,117,770,254.79/35,680.40
  6. Step 6: Final answer
    x = 31,327.29

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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.