Home / 42,087.36-63,138.24-19,911.36

Finding the Fourth Proportional to 42,087.36, 63,138.24 and 19,911.36

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Solution

The fourth proportional to 42,087.36, 63,138.24 and 19,911.36 is: 29,870.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,087.36 : 63,138.24 = 19,911.36 : x
  2. Step 2: Convert to fraction form
    42,087.36/63,138.24 = 19,911.36/x
  3. Step 3: Cross multiply
    42,087.36x = 63,138.24 × 19,911.36
  4. Step 4: Simplify right side
    42,087.36x = 1,257,168,226.41
  5. Step 5: Solve for x
    x = 1,257,168,226.41/42,087.36
  6. Step 6: Final answer
    x = 29,870.45

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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.