Home / 21,784.64-30,058.14-12,828.86

Finding the Fourth Proportional to 21,784.64, 30,058.14 and 12,828.86

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Solution

The fourth proportional to 21,784.64, 30,058.14 and 12,828.86 is: 17,701.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,784.64 : 30,058.14 = 12,828.86 : x
  2. Step 2: Convert to fraction form
    21,784.64/30,058.14 = 12,828.86/x
  3. Step 3: Cross multiply
    21,784.64x = 30,058.14 × 12,828.86
  4. Step 4: Simplify right side
    21,784.64x = 385,611,669.92
  5. Step 5: Solve for x
    x = 385,611,669.92/21,784.64
  6. Step 6: Final answer
    x = 17,701.08

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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.