Home / 7,784.13-10,742.10-4,989.63

Finding the Fourth Proportional to 7,784.13, 10,742.10 and 4,989.63

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Solution

The fourth proportional to 7,784.13, 10,742.10 and 4,989.63 is: 6,885.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,784.13 : 10,742.10 = 4,989.63 : x
  2. Step 2: Convert to fraction form
    7,784.13/10,742.10 = 4,989.63/x
  3. Step 3: Cross multiply
    7,784.13x = 10,742.10 × 4,989.63
  4. Step 4: Simplify right side
    7,784.13x = 53,599,104.42
  5. Step 5: Solve for x
    x = 53,599,104.42/7,784.13
  6. Step 6: Final answer
    x = 6,885.69

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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.