Home / 21,612.99-29,828.86-12,664.05

Finding the Fourth Proportional to 21,612.99, 29,828.86 and 12,664.05

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Solution

The fourth proportional to 21,612.99, 29,828.86 and 12,664.05 is: 17,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.99 : 29,828.86 = 12,664.05 : x
  2. Step 2: Convert to fraction form
    21,612.99/29,828.86 = 12,664.05/x
  3. Step 3: Cross multiply
    21,612.99x = 29,828.86 × 12,664.05
  4. Step 4: Simplify right side
    21,612.99x = 377,754,030.96
  5. Step 5: Solve for x
    x = 377,754,030.96/21,612.99
  6. Step 6: Final answer
    x = 17,478.10

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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.