Home / 13,155.07-18,153.93-7,187.08

Finding the Fourth Proportional to 13,155.07, 18,153.93 and 7,187.08

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Solution

The fourth proportional to 13,155.07, 18,153.93 and 7,187.08 is: 9,918.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.07 : 18,153.93 = 7,187.08 : x
  2. Step 2: Convert to fraction form
    13,155.07/18,153.93 = 7,187.08/x
  3. Step 3: Cross multiply
    13,155.07x = 18,153.93 × 7,187.08
  4. Step 4: Simplify right side
    13,155.07x = 130,473,747.22
  5. Step 5: Solve for x
    x = 130,473,747.22/13,155.07
  6. Step 6: Final answer
    x = 9,918.13

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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.