Home / 7,784.63-10,742.79-4,990.13

Finding the Fourth Proportional to 7,784.63, 10,742.79 and 4,990.13

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Solution

The fourth proportional to 7,784.63, 10,742.79 and 4,990.13 is: 6,886.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,784.63 : 10,742.79 = 4,990.13 : x
  2. Step 2: Convert to fraction form
    7,784.63/10,742.79 = 4,990.13/x
  3. Step 3: Cross multiply
    7,784.63x = 10,742.79 × 4,990.13
  4. Step 4: Simplify right side
    7,784.63x = 53,607,864.95
  5. Step 5: Solve for x
    x = 53,607,864.95/7,784.63
  6. Step 6: Final answer
    x = 6,886.38

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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.