Home / 21,516.16-29,681.76-13,118.08

Finding the Fourth Proportional to 21,516.16, 29,681.76 and 13,118.08

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Solution

The fourth proportional to 21,516.16, 29,681.76 and 13,118.08 is: 18,096.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.16 : 29,681.76 = 13,118.08 : x
  2. Step 2: Convert to fraction form
    21,516.16/29,681.76 = 13,118.08/x
  3. Step 3: Cross multiply
    21,516.16x = 29,681.76 × 13,118.08
  4. Step 4: Simplify right side
    21,516.16x = 389,367,702.22
  5. Step 5: Solve for x
    x = 389,367,702.22/21,516.16
  6. Step 6: Final answer
    x = 18,096.52

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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.