Home / 18,386.40-25,365.60-11,308.80

Finding the Fourth Proportional to 18,386.40, 25,365.60 and 11,308.80

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Solution

The fourth proportional to 18,386.40, 25,365.60 and 11,308.80 is: 15,601.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,386.40 : 25,365.60 = 11,308.80 : x
  2. Step 2: Convert to fraction form
    18,386.40/25,365.60 = 11,308.80/x
  3. Step 3: Cross multiply
    18,386.40x = 25,365.60 × 11,308.80
  4. Step 4: Simplify right side
    18,386.40x = 286,854,497.28
  5. Step 5: Solve for x
    x = 286,854,497.28/18,386.40
  6. Step 6: Final answer
    x = 15,601.45

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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.