Home / 13,931.28-19,225.22-7,643.79

Finding the Fourth Proportional to 13,931.28, 19,225.22 and 7,643.79

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Solution

The fourth proportional to 13,931.28, 19,225.22 and 7,643.79 is: 10,548.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.28 : 19,225.22 = 7,643.79 : x
  2. Step 2: Convert to fraction form
    13,931.28/19,225.22 = 7,643.79/x
  3. Step 3: Cross multiply
    13,931.28x = 19,225.22 × 7,643.79
  4. Step 4: Simplify right side
    13,931.28x = 146,953,506.16
  5. Step 5: Solve for x
    x = 146,953,506.16/13,931.28
  6. Step 6: Final answer
    x = 10,548.46

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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.