Home / 28,003,772.40-42,005,658.60-21,285,308.40

Finding the Fourth Proportional to 28,003,772.40, 42,005,658.60 and 21,285,308.40

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Solution

The fourth proportional to 28,003,772.40, 42,005,658.60 and 21,285,308.40 is: 31,927,962.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003,772.40 : 42,005,658.60 = 21,285,308.40 : x
  2. Step 2: Convert to fraction form
    28,003,772.40/42,005,658.60 = 21,285,308.40/x
  3. Step 3: Cross multiply
    28,003,772.40x = 42,005,658.60 × 21,285,308.40
  4. Step 4: Simplify right side
    28,003,772.40x = 894,103,397,846,112.25
  5. Step 5: Solve for x
    x = 894,103,397,846,112.25/28,003,772.40
  6. Step 6: Final answer
    x = 31,927,962.60

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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.