Home / 13,690.02-18,892.24-7,402.40

Finding the Fourth Proportional to 13,690.02, 18,892.24 and 7,402.40

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Solution

The fourth proportional to 13,690.02, 18,892.24 and 7,402.40 is: 10,215.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.02 : 18,892.24 = 7,402.40 : x
  2. Step 2: Convert to fraction form
    13,690.02/18,892.24 = 7,402.40/x
  3. Step 3: Cross multiply
    13,690.02x = 18,892.24 × 7,402.40
  4. Step 4: Simplify right side
    13,690.02x = 139,847,917.38
  5. Step 5: Solve for x
    x = 139,847,917.38/13,690.02
  6. Step 6: Final answer
    x = 10,215.32

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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.