Home / 13,931.19-19,223.73-7,964.78

Finding the Fourth Proportional to 13,931.19, 19,223.73 and 7,964.78

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Solution

The fourth proportional to 13,931.19, 19,223.73 and 7,964.78 is: 10,990.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.19 : 19,223.73 = 7,964.78 : x
  2. Step 2: Convert to fraction form
    13,931.19/19,223.73 = 7,964.78/x
  3. Step 3: Cross multiply
    13,931.19x = 19,223.73 × 7,964.78
  4. Step 4: Simplify right side
    13,931.19x = 153,112,792.24
  5. Step 5: Solve for x
    x = 153,112,792.24/13,931.19
  6. Step 6: Final answer
    x = 10,990.65

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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.