Home / 13,681.91-18,881.40-7,713.23

Finding the Fourth Proportional to 13,681.91, 18,881.40 and 7,713.23

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Solution

The fourth proportional to 13,681.91, 18,881.40 and 7,713.23 is: 10,644.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.91 : 18,881.40 = 7,713.23 : x
  2. Step 2: Convert to fraction form
    13,681.91/18,881.40 = 7,713.23/x
  3. Step 3: Cross multiply
    13,681.91x = 18,881.40 × 7,713.23
  4. Step 4: Simplify right side
    13,681.91x = 145,636,515.44
  5. Step 5: Solve for x
    x = 145,636,515.44/13,681.91
  6. Step 6: Final answer
    x = 10,644.46

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Double scale
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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.