Home / 4,938.47-7,407.71-1,978.25

Finding the Fourth Proportional to 4,938.47, 7,407.71 and 1,978.25

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Solution

The fourth proportional to 4,938.47, 7,407.71 and 1,978.25 is: 2,967.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,938.47 : 7,407.71 = 1,978.25 : x
  2. Step 2: Convert to fraction form
    4,938.47/7,407.71 = 1,978.25/x
  3. Step 3: Cross multiply
    4,938.47x = 7,407.71 × 1,978.25
  4. Step 4: Simplify right side
    4,938.47x = 14,654,325.77
  5. Step 5: Solve for x
    x = 14,654,325.77/4,938.47
  6. Step 6: Final answer
    x = 2,967.38

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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.