Home / 21,563.55-29,746.80-12,605.20

Finding the Fourth Proportional to 21,563.55, 29,746.80 and 12,605.20

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Solution

The fourth proportional to 21,563.55, 29,746.80 and 12,605.20 is: 17,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,563.55 : 29,746.80 = 12,605.20 : x
  2. Step 2: Convert to fraction form
    21,563.55/29,746.80 = 12,605.20/x
  3. Step 3: Cross multiply
    21,563.55x = 29,746.80 × 12,605.20
  4. Step 4: Simplify right side
    21,563.55x = 374,964,363.36
  5. Step 5: Solve for x
    x = 374,964,363.36/21,563.55
  6. Step 6: Final answer
    x = 17,388.80

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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.