Home / 9,985.55-13,780.07-5,509.57

Finding the Fourth Proportional to 9,985.55, 13,780.07 and 5,509.57

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Solution

The fourth proportional to 9,985.55, 13,780.07 and 5,509.57 is: 7,603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.55 : 13,780.07 = 5,509.57 : x
  2. Step 2: Convert to fraction form
    9,985.55/13,780.07 = 5,509.57/x
  3. Step 3: Cross multiply
    9,985.55x = 13,780.07 × 5,509.57
  4. Step 4: Simplify right side
    9,985.55x = 75,922,275.76
  5. Step 5: Solve for x
    x = 75,922,275.76/9,985.55
  6. Step 6: Final answer
    x = 7,603.21

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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.