Home / 21,576.61-29,790.36-13,513.51

Finding the Fourth Proportional to 21,576.61, 29,790.36 and 13,513.51

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Solution

The fourth proportional to 21,576.61, 29,790.36 and 13,513.51 is: 18,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.61 : 29,790.36 = 13,513.51 : x
  2. Step 2: Convert to fraction form
    21,576.61/29,790.36 = 13,513.51/x
  3. Step 3: Cross multiply
    21,576.61x = 29,790.36 × 13,513.51
  4. Step 4: Simplify right side
    21,576.61x = 402,572,327.76
  5. Step 5: Solve for x
    x = 402,572,327.76/21,576.61
  6. Step 6: Final answer
    x = 18,657.81

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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.