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Finding the Fourth Proportional to 21,887.40, 32,831.10 and 21,522.90

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Solution

The fourth proportional to 21,887.40, 32,831.10 and 21,522.90 is: 32,284.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.40 : 32,831.10 = 21,522.90 : x
  2. Step 2: Convert to fraction form
    21,887.40/32,831.10 = 21,522.90/x
  3. Step 3: Cross multiply
    21,887.40x = 32,831.10 × 21,522.90
  4. Step 4: Simplify right side
    21,887.40x = 706,620,482.19
  5. Step 5: Solve for x
    x = 706,620,482.19/21,887.40
  6. Step 6: Final answer
    x = 32,284.35

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1.5x scale

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.