Home / 13,090.60-18,065.12-7,122.18

Finding the Fourth Proportional to 13,090.60, 18,065.12 and 7,122.18

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Solution

The fourth proportional to 13,090.60, 18,065.12 and 7,122.18 is: 9,828.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.60 : 18,065.12 = 7,122.18 : x
  2. Step 2: Convert to fraction form
    13,090.60/18,065.12 = 7,122.18/x
  3. Step 3: Cross multiply
    13,090.60x = 18,065.12 × 7,122.18
  4. Step 4: Simplify right side
    13,090.60x = 128,663,036.36
  5. Step 5: Solve for x
    x = 128,663,036.36/13,090.60
  6. Step 6: Final answer
    x = 9,828.66

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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.