Home / 13,710.02-18,919.89-7,422.40

Finding the Fourth Proportional to 13,710.02, 18,919.89 and 7,422.40

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Solution

The fourth proportional to 13,710.02, 18,919.89 and 7,422.40 is: 10,242.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.02 : 18,919.89 = 7,422.40 : x
  2. Step 2: Convert to fraction form
    13,710.02/18,919.89 = 7,422.40/x
  3. Step 3: Cross multiply
    13,710.02x = 18,919.89 × 7,422.40
  4. Step 4: Simplify right side
    13,710.02x = 140,430,944.24
  5. Step 5: Solve for x
    x = 140,430,944.24/13,710.02
  6. Step 6: Final answer
    x = 10,242.94

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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.