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Finding the Fourth Proportional to 5,259.51, 7,890.80 and 1,972.86

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Solution

The fourth proportional to 5,259.51, 7,890.80 and 1,972.86 is: 2,959.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,259.51 : 7,890.80 = 1,972.86 : x
  2. Step 2: Convert to fraction form
    5,259.51/7,890.80 = 1,972.86/x
  3. Step 3: Cross multiply
    5,259.51x = 7,890.80 × 1,972.86
  4. Step 4: Simplify right side
    5,259.51x = 15,567,433.82
  5. Step 5: Solve for x
    x = 15,567,433.82/5,259.51
  6. Step 6: Final answer
    x = 2,959.86

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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.