Home / 21,241.81-29,312.56-11,681.51

Finding the Fourth Proportional to 21,241.81, 29,312.56 and 11,681.51

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Solution

The fourth proportional to 21,241.81, 29,312.56 and 11,681.51 is: 16,119.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.81 : 29,312.56 = 11,681.51 : x
  2. Step 2: Convert to fraction form
    21,241.81/29,312.56 = 11,681.51/x
  3. Step 3: Cross multiply
    21,241.81x = 29,312.56 × 11,681.51
  4. Step 4: Simplify right side
    21,241.81x = 342,414,962.77
  5. Step 5: Solve for x
    x = 342,414,962.77/21,241.81
  6. Step 6: Final answer
    x = 16,119.86

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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.