Home / 20,130.16-27,779.10-11,177.56

Finding the Fourth Proportional to 20,130.16, 27,779.10 and 11,177.56

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Solution

The fourth proportional to 20,130.16, 27,779.10 and 11,177.56 is: 15,424.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.16 : 27,779.10 = 11,177.56 : x
  2. Step 2: Convert to fraction form
    20,130.16/27,779.10 = 11,177.56/x
  3. Step 3: Cross multiply
    20,130.16x = 27,779.10 × 11,177.56
  4. Step 4: Simplify right side
    20,130.16x = 310,502,557.00
  5. Step 5: Solve for x
    x = 310,502,557.00/20,130.16
  6. Step 6: Final answer
    x = 15,424.74

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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.