Home / 13,090.02-18,064.40-7,121.78

Finding the Fourth Proportional to 13,090.02, 18,064.40 and 7,121.78

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Solution

The fourth proportional to 13,090.02, 18,064.40 and 7,121.78 is: 9,828.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.02 : 18,064.40 = 7,121.78 : x
  2. Step 2: Convert to fraction form
    13,090.02/18,064.40 = 7,121.78/x
  3. Step 3: Cross multiply
    13,090.02x = 18,064.40 × 7,121.78
  4. Step 4: Simplify right side
    13,090.02x = 128,650,682.63
  5. Step 5: Solve for x
    x = 128,650,682.63/13,090.02
  6. Step 6: Final answer
    x = 9,828.15

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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.