Home / 13,982.40-19,291.36-7,931.64

Finding the Fourth Proportional to 13,982.40, 19,291.36 and 7,931.64

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Solution

The fourth proportional to 13,982.40, 19,291.36 and 7,931.64 is: 10,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,982.40 : 19,291.36 = 7,931.64 : x
  2. Step 2: Convert to fraction form
    13,982.40/19,291.36 = 7,931.64/x
  3. Step 3: Cross multiply
    13,982.40x = 19,291.36 × 7,931.64
  4. Step 4: Simplify right side
    13,982.40x = 153,012,122.63
  5. Step 5: Solve for x
    x = 153,012,122.63/13,982.40
  6. Step 6: Final answer
    x = 10,943.20

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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.