Home / 13,090.78-18,065.40-7,122.52

Finding the Fourth Proportional to 13,090.78, 18,065.40 and 7,122.52

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Solution

The fourth proportional to 13,090.78, 18,065.40 and 7,122.52 is: 9,829.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.78 : 18,065.40 = 7,122.52 : x
  2. Step 2: Convert to fraction form
    13,090.78/18,065.40 = 7,122.52/x
  3. Step 3: Cross multiply
    13,090.78x = 18,065.40 × 7,122.52
  4. Step 4: Simplify right side
    13,090.78x = 128,671,172.81
  5. Step 5: Solve for x
    x = 128,671,172.81/13,090.78
  6. Step 6: Final answer
    x = 9,829.14

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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.