Home / 4,947.56-7,421.28-1,987.31

Finding the Fourth Proportional to 4,947.56, 7,421.28 and 1,987.31

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Solution

The fourth proportional to 4,947.56, 7,421.28 and 1,987.31 is: 2,980.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,947.56 : 7,421.28 = 1,987.31 : x
  2. Step 2: Convert to fraction form
    4,947.56/7,421.28 = 1,987.31/x
  3. Step 3: Cross multiply
    4,947.56x = 7,421.28 × 1,987.31
  4. Step 4: Simplify right side
    4,947.56x = 14,748,395.06
  5. Step 5: Solve for x
    x = 14,748,395.06/4,947.56
  6. Step 6: Final answer
    x = 2,980.94

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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.