Home / 7,890.51-10,890.78-4,908.63

Finding the Fourth Proportional to 7,890.51, 10,890.78 and 4,908.63

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Solution

The fourth proportional to 7,890.51, 10,890.78 and 4,908.63 is: 6,775.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.51 : 10,890.78 = 4,908.63 : x
  2. Step 2: Convert to fraction form
    7,890.51/10,890.78 = 4,908.63/x
  3. Step 3: Cross multiply
    7,890.51x = 10,890.78 × 4,908.63
  4. Step 4: Simplify right side
    7,890.51x = 53,458,809.43
  5. Step 5: Solve for x
    x = 53,458,809.43/7,890.51
  6. Step 6: Final answer
    x = 6,775.08

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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.