Home / 42,290.40-63,435.60-21,222.30

Finding the Fourth Proportional to 42,290.40, 63,435.60 and 21,222.30

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Solution

The fourth proportional to 42,290.40, 63,435.60 and 21,222.30 is: 31,833.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,290.40 : 63,435.60 = 21,222.30 : x
  2. Step 2: Convert to fraction form
    42,290.40/63,435.60 = 21,222.30/x
  3. Step 3: Cross multiply
    42,290.40x = 63,435.60 × 21,222.30
  4. Step 4: Simplify right side
    42,290.40x = 1,346,249,333.88
  5. Step 5: Solve for x
    x = 1,346,249,333.88/42,290.40
  6. Step 6: Final answer
    x = 31,833.45

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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.