Home / 13,710.28-18,921.04-7,739.76

Finding the Fourth Proportional to 13,710.28, 18,921.04 and 7,739.76

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Solution

The fourth proportional to 13,710.28, 18,921.04 and 7,739.76 is: 10,681.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.28 : 18,921.04 = 7,739.76 : x
  2. Step 2: Convert to fraction form
    13,710.28/18,921.04 = 7,739.76/x
  3. Step 3: Cross multiply
    13,710.28x = 18,921.04 × 7,739.76
  4. Step 4: Simplify right side
    13,710.28x = 146,444,308.55
  5. Step 5: Solve for x
    x = 146,444,308.55/13,710.28
  6. Step 6: Final answer
    x = 10,681.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.