Home / 9,139.40-13,699.64-4,978.27

Finding the Fourth Proportional to 9,139.40, 13,699.64 and 4,978.27

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Solution

The fourth proportional to 9,139.40, 13,699.64 and 4,978.27 is: 7,462.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.40 : 13,699.64 = 4,978.27 : x
  2. Step 2: Convert to fraction form
    9,139.40/13,699.64 = 4,978.27/x
  3. Step 3: Cross multiply
    9,139.40x = 13,699.64 × 4,978.27
  4. Step 4: Simplify right side
    9,139.40x = 68,200,485.02
  5. Step 5: Solve for x
    x = 68,200,485.02/9,139.40
  6. Step 6: Final answer
    x = 7,462.25

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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.