Home / 9,985.45-13,779.85-5,509.39

Finding the Fourth Proportional to 9,985.45, 13,779.85 and 5,509.39

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Solution

The fourth proportional to 9,985.45, 13,779.85 and 5,509.39 is: 7,602.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.45 : 13,779.85 = 5,509.39 : x
  2. Step 2: Convert to fraction form
    9,985.45/13,779.85 = 5,509.39/x
  3. Step 3: Cross multiply
    9,985.45x = 13,779.85 × 5,509.39
  4. Step 4: Simplify right side
    9,985.45x = 75,918,567.79
  5. Step 5: Solve for x
    x = 75,918,567.79/9,985.45
  6. Step 6: Final answer
    x = 7,602.92

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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.