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Finding the Fourth Proportional to 40,912.31, 61,368.57 and 13,210.31

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Solution

The fourth proportional to 40,912.31, 61,368.57 and 13,210.31 is: 19,815.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,912.31 : 61,368.57 = 13,210.31 : x
  2. Step 2: Convert to fraction form
    40,912.31/61,368.57 = 13,210.31/x
  3. Step 3: Cross multiply
    40,912.31x = 61,368.57 × 13,210.31
  4. Step 4: Simplify right side
    40,912.31x = 810,697,987.38
  5. Step 5: Solve for x
    x = 810,697,987.38/40,912.31
  6. Step 6: Final answer
    x = 19,815.50

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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.