Home / 15,779.07-21,774.56-8,705.48

Finding the Fourth Proportional to 15,779.07, 21,774.56 and 8,705.48

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Solution

The fourth proportional to 15,779.07, 21,774.56 and 8,705.48 is: 12,013.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.07 : 21,774.56 = 8,705.48 : x
  2. Step 2: Convert to fraction form
    15,779.07/21,774.56 = 8,705.48/x
  3. Step 3: Cross multiply
    15,779.07x = 21,774.56 × 8,705.48
  4. Step 4: Simplify right side
    15,779.07x = 189,557,844.19
  5. Step 5: Solve for x
    x = 189,557,844.19/15,779.07
  6. Step 6: Final answer
    x = 12,013.25

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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.