Home / 51,390.32-77,038.70-19,780.20

Finding the Fourth Proportional to 51,390.32, 77,038.70 and 19,780.20

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Solution

The fourth proportional to 51,390.32, 77,038.70 and 19,780.20 is: 29,652.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,390.32 : 77,038.70 = 19,780.20 : x
  2. Step 2: Convert to fraction form
    51,390.32/77,038.70 = 19,780.20/x
  3. Step 3: Cross multiply
    51,390.32x = 77,038.70 × 19,780.20
  4. Step 4: Simplify right side
    51,390.32x = 1,523,840,893.74
  5. Step 5: Solve for x
    x = 1,523,840,893.74/51,390.32
  6. Step 6: Final answer
    x = 29,652.29

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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.