Home / 21,790.32-30,079.78-14,726.32

Finding the Fourth Proportional to 21,790.32, 30,079.78 and 14,726.32

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Solution

The fourth proportional to 21,790.32, 30,079.78 and 14,726.32 is: 20,328.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.32 : 30,079.78 = 14,726.32 : x
  2. Step 2: Convert to fraction form
    21,790.32/30,079.78 = 14,726.32/x
  3. Step 3: Cross multiply
    21,790.32x = 30,079.78 × 14,726.32
  4. Step 4: Simplify right side
    21,790.32x = 442,964,465.81
  5. Step 5: Solve for x
    x = 442,964,465.81/21,790.32
  6. Step 6: Final answer
    x = 20,328.50

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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.