Home / 28,556.48-42,830.04-7,781.60

Finding the Fourth Proportional to 28,556.48, 42,830.04 and 7,781.60

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Solution

The fourth proportional to 28,556.48, 42,830.04 and 7,781.60 is: 11,671.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.48 : 42,830.04 = 7,781.60 : x
  2. Step 2: Convert to fraction form
    28,556.48/42,830.04 = 7,781.60/x
  3. Step 3: Cross multiply
    28,556.48x = 42,830.04 × 7,781.60
  4. Step 4: Simplify right side
    28,556.48x = 333,286,239.26
  5. Step 5: Solve for x
    x = 333,286,239.26/28,556.48
  6. Step 6: Final answer
    x = 11,671.12

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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.