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Finding the Fourth Proportional to 28,556.51, 42,834.83 and 7,780.01

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Solution

The fourth proportional to 28,556.51, 42,834.83 and 7,780.01 is: 11,670.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.51 : 42,834.83 = 7,780.01 : x
  2. Step 2: Convert to fraction form
    28,556.51/42,834.83 = 7,780.01/x
  3. Step 3: Cross multiply
    28,556.51x = 42,834.83 × 7,780.01
  4. Step 4: Simplify right side
    28,556.51x = 333,255,152.67
  5. Step 5: Solve for x
    x = 333,255,152.67/28,556.51
  6. Step 6: Final answer
    x = 11,670.03

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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.