Home / 21,070.83-29,084.06-12,578.90

Finding the Fourth Proportional to 21,070.83, 29,084.06 and 12,578.90

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Solution

The fourth proportional to 21,070.83, 29,084.06 and 12,578.90 is: 17,362.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.83 : 29,084.06 = 12,578.90 : x
  2. Step 2: Convert to fraction form
    21,070.83/29,084.06 = 12,578.90/x
  3. Step 3: Cross multiply
    21,070.83x = 29,084.06 × 12,578.90
  4. Step 4: Simplify right side
    21,070.83x = 365,845,368.36
  5. Step 5: Solve for x
    x = 365,845,368.36/21,070.83
  6. Step 6: Final answer
    x = 17,362.64

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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.