Home / 13,931.40-19,225.38-7,643.88

Finding the Fourth Proportional to 13,931.40, 19,225.38 and 7,643.88

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Solution

The fourth proportional to 13,931.40, 19,225.38 and 7,643.88 is: 10,548.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.40 : 19,225.38 = 7,643.88 : x
  2. Step 2: Convert to fraction form
    13,931.40/19,225.38 = 7,643.88/x
  3. Step 3: Cross multiply
    13,931.40x = 19,225.38 × 7,643.88
  4. Step 4: Simplify right side
    13,931.40x = 146,956,497.67
  5. Step 5: Solve for x
    x = 146,956,497.67/13,931.40
  6. Step 6: Final answer
    x = 10,548.58

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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.