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Finding the Fourth Proportional to 21,798.64, 32,666.71 and 12,419.25

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Solution

The fourth proportional to 21,798.64, 32,666.71 and 12,419.25 is: 18,611.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.64 : 32,666.71 = 12,419.25 : x
  2. Step 2: Convert to fraction form
    21,798.64/32,666.71 = 12,419.25/x
  3. Step 3: Cross multiply
    21,798.64x = 32,666.71 × 12,419.25
  4. Step 4: Simplify right side
    21,798.64x = 405,696,038.17
  5. Step 5: Solve for x
    x = 405,696,038.17/21,798.64
  6. Step 6: Final answer
    x = 18,611.07

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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.