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Finding the Fourth Proportional to 35,950.40, 53,957.60 and 21,140.80

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Solution

The fourth proportional to 35,950.40, 53,957.60 and 21,140.80 is: 31,730.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,950.40 : 53,957.60 = 21,140.80 : x
  2. Step 2: Convert to fraction form
    35,950.40/53,957.60 = 21,140.80/x
  3. Step 3: Cross multiply
    35,950.40x = 53,957.60 × 21,140.80
  4. Step 4: Simplify right side
    35,950.40x = 1,140,706,830.08
  5. Step 5: Solve for x
    x = 1,140,706,830.08/35,950.40
  6. Step 6: Final answer
    x = 31,730.02

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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.