Home / 18,678.02-25,779.49-11,128.77

Finding the Fourth Proportional to 18,678.02, 25,779.49 and 11,128.77

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Solution

The fourth proportional to 18,678.02, 25,779.49 and 11,128.77 is: 15,359.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.02 : 25,779.49 = 11,128.77 : x
  2. Step 2: Convert to fraction form
    18,678.02/25,779.49 = 11,128.77/x
  3. Step 3: Cross multiply
    18,678.02x = 25,779.49 × 11,128.77
  4. Step 4: Simplify right side
    18,678.02x = 286,893,987.11
  5. Step 5: Solve for x
    x = 286,893,987.11/18,678.02
  6. Step 6: Final answer
    x = 15,359.98

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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.