Home / 6,530.80-9,815.40-6,415.60

Finding the Fourth Proportional to 6,530.80, 9,815.40 and 6,415.60

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Solution

The fourth proportional to 6,530.80, 9,815.40 and 6,415.60 is: 9,642.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,530.80 : 9,815.40 = 6,415.60 : x
  2. Step 2: Convert to fraction form
    6,530.80/9,815.40 = 6,415.60/x
  3. Step 3: Cross multiply
    6,530.80x = 9,815.40 × 6,415.60
  4. Step 4: Simplify right side
    6,530.80x = 62,971,680.24
  5. Step 5: Solve for x
    x = 62,971,680.24/6,530.80
  6. Step 6: Final answer
    x = 9,642.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.