Home / 10,090.42-13,931.64-6,315.12

Finding the Fourth Proportional to 10,090.42, 13,931.64 and 6,315.12

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Solution

The fourth proportional to 10,090.42, 13,931.64 and 6,315.12 is: 8,719.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,090.42 : 13,931.64 = 6,315.12 : x
  2. Step 2: Convert to fraction form
    10,090.42/13,931.64 = 6,315.12/x
  3. Step 3: Cross multiply
    10,090.42x = 13,931.64 × 6,315.12
  4. Step 4: Simplify right side
    10,090.42x = 87,979,978.40
  5. Step 5: Solve for x
    x = 87,979,978.40/10,090.42
  6. Step 6: Final answer
    x = 8,719.16

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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.