Home / 21,603.18-32,331.60-13,288.47

Finding the Fourth Proportional to 21,603.18, 32,331.60 and 13,288.47

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Solution

The fourth proportional to 21,603.18, 32,331.60 and 13,288.47 is: 19,887.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.18 : 32,331.60 = 13,288.47 : x
  2. Step 2: Convert to fraction form
    21,603.18/32,331.60 = 13,288.47/x
  3. Step 3: Cross multiply
    21,603.18x = 32,331.60 × 13,288.47
  4. Step 4: Simplify right side
    21,603.18x = 429,637,496.65
  5. Step 5: Solve for x
    x = 429,637,496.65/21,603.18
  6. Step 6: Final answer
    x = 19,887.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.