Home / 13,291.78-18,342.45-7,626.40

Finding the Fourth Proportional to 13,291.78, 18,342.45 and 7,626.40

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Solution

The fourth proportional to 13,291.78, 18,342.45 and 7,626.40 is: 10,524.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.78 : 18,342.45 = 7,626.40 : x
  2. Step 2: Convert to fraction form
    13,291.78/18,342.45 = 7,626.40/x
  3. Step 3: Cross multiply
    13,291.78x = 18,342.45 × 7,626.40
  4. Step 4: Simplify right side
    13,291.78x = 139,886,807.29
  5. Step 5: Solve for x
    x = 139,886,807.29/13,291.78
  6. Step 6: Final answer
    x = 10,524.31

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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.