Home / 31,129,424.72-42,970,069.80-18,740,094.32

Finding the Fourth Proportional to 31,129,424.72, 42,970,069.80 and 18,740,094.32

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Solution

The fourth proportional to 31,129,424.72, 42,970,069.80 and 18,740,094.32 is: 25,868,231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,129,424.72 : 42,970,069.80 = 18,740,094.32 : x
  2. Step 2: Convert to fraction form
    31,129,424.72/42,970,069.80 = 18,740,094.32/x
  3. Step 3: Cross multiply
    31,129,424.72x = 42,970,069.80 × 18,740,094.32
  4. Step 4: Simplify right side
    31,129,424.72x = 805,263,160,988,983.50
  5. Step 5: Solve for x
    x = 805,263,160,988,983.50/31,129,424.72
  6. Step 6: Final answer
    x = 25,868,231.37

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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.