Home / 13,090.28-18,064.35-7,122.06

Finding the Fourth Proportional to 13,090.28, 18,064.35 and 7,122.06

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Solution

The fourth proportional to 13,090.28, 18,064.35 and 7,122.06 is: 9,828.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.28 : 18,064.35 = 7,122.06 : x
  2. Step 2: Convert to fraction form
    13,090.28/18,064.35 = 7,122.06/x
  3. Step 3: Cross multiply
    13,090.28x = 18,064.35 × 7,122.06
  4. Step 4: Simplify right side
    13,090.28x = 128,655,384.56
  5. Step 5: Solve for x
    x = 128,655,384.56/13,090.28
  6. Step 6: Final answer
    x = 9,828.32

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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.