Home / 11,307.72-15,615.54-7,779.36

Finding the Fourth Proportional to 11,307.72, 15,615.54 and 7,779.36

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Solution

The fourth proportional to 11,307.72, 15,615.54 and 7,779.36 is: 10,743.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,307.72 : 15,615.54 = 7,779.36 : x
  2. Step 2: Convert to fraction form
    11,307.72/15,615.54 = 7,779.36/x
  3. Step 3: Cross multiply
    11,307.72x = 15,615.54 × 7,779.36
  4. Step 4: Simplify right side
    11,307.72x = 121,478,907.25
  5. Step 5: Solve for x
    x = 121,478,907.25/11,307.72
  6. Step 6: Final answer
    x = 10,743.01

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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.