Home / 21,585.32-29,790.60-12,155.72

Finding the Fourth Proportional to 21,585.32, 29,790.60 and 12,155.72

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Solution

The fourth proportional to 21,585.32, 29,790.60 and 12,155.72 is: 16,776.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,585.32 : 29,790.60 = 12,155.72 : x
  2. Step 2: Convert to fraction form
    21,585.32/29,790.60 = 12,155.72/x
  3. Step 3: Cross multiply
    21,585.32x = 29,790.60 × 12,155.72
  4. Step 4: Simplify right side
    21,585.32x = 362,126,192.23
  5. Step 5: Solve for x
    x = 362,126,192.23/21,585.32
  6. Step 6: Final answer
    x = 16,776.50

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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.