Home / 21,603.04-29,814.60-13,644.88

Finding the Fourth Proportional to 21,603.04, 29,814.60 and 13,644.88

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Solution

The fourth proportional to 21,603.04, 29,814.60 and 13,644.88 is: 18,831.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.04 : 29,814.60 = 13,644.88 : x
  2. Step 2: Convert to fraction form
    21,603.04/29,814.60 = 13,644.88/x
  3. Step 3: Cross multiply
    21,603.04x = 29,814.60 × 13,644.88
  4. Step 4: Simplify right side
    21,603.04x = 406,816,639.25
  5. Step 5: Solve for x
    x = 406,816,639.25/21,603.04
  6. Step 6: Final answer
    x = 18,831.45

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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.