Home / 21,516.61-29,701.38-13,557.34

Finding the Fourth Proportional to 21,516.61, 29,701.38 and 13,557.34

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Solution

The fourth proportional to 21,516.61, 29,701.38 and 13,557.34 is: 18,714.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.61 : 29,701.38 = 13,557.34 : x
  2. Step 2: Convert to fraction form
    21,516.61/29,701.38 = 13,557.34/x
  3. Step 3: Cross multiply
    21,516.61x = 29,701.38 × 13,557.34
  4. Step 4: Simplify right side
    21,516.61x = 402,671,707.13
  5. Step 5: Solve for x
    x = 402,671,707.13/21,516.61
  6. Step 6: Final answer
    x = 18,714.46

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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.