Home / 21,996.25-30,345.36-13,038.95

Finding the Fourth Proportional to 21,996.25, 30,345.36 and 13,038.95

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Solution

The fourth proportional to 21,996.25, 30,345.36 and 13,038.95 is: 17,988.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.25 : 30,345.36 = 13,038.95 : x
  2. Step 2: Convert to fraction form
    21,996.25/30,345.36 = 13,038.95/x
  3. Step 3: Cross multiply
    21,996.25x = 30,345.36 × 13,038.95
  4. Step 4: Simplify right side
    21,996.25x = 395,671,631.77
  5. Step 5: Solve for x
    x = 395,671,631.77/21,996.25
  6. Step 6: Final answer
    x = 17,988.14

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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.