Home / 13,305.48-18,360.81-7,639.08

Finding the Fourth Proportional to 13,305.48, 18,360.81 and 7,639.08

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Solution

The fourth proportional to 13,305.48, 18,360.81 and 7,639.08 is: 10,541.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.48 : 18,360.81 = 7,639.08 : x
  2. Step 2: Convert to fraction form
    13,305.48/18,360.81 = 7,639.08/x
  3. Step 3: Cross multiply
    13,305.48x = 18,360.81 × 7,639.08
  4. Step 4: Simplify right side
    13,305.48x = 140,259,696.45
  5. Step 5: Solve for x
    x = 140,259,696.45/13,305.48
  6. Step 6: Final answer
    x = 10,541.50

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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.