Home / 13,355.90-18,409.76-9,047.68

Finding the Fourth Proportional to 13,355.90, 18,409.76 and 9,047.68

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Solution

The fourth proportional to 13,355.90, 18,409.76 and 9,047.68 is: 12,471.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.90 : 18,409.76 = 9,047.68 : x
  2. Step 2: Convert to fraction form
    13,355.90/18,409.76 = 9,047.68/x
  3. Step 3: Cross multiply
    13,355.90x = 18,409.76 × 9,047.68
  4. Step 4: Simplify right side
    13,355.90x = 166,565,682.47
  5. Step 5: Solve for x
    x = 166,565,682.47/13,355.90
  6. Step 6: Final answer
    x = 12,471.32

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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.