Home / 21,587.65-29,790.93-12,156.28

Finding the Fourth Proportional to 21,587.65, 29,790.93 and 12,156.28

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Solution

The fourth proportional to 21,587.65, 29,790.93 and 12,156.28 is: 16,775.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.65 : 29,790.93 = 12,156.28 : x
  2. Step 2: Convert to fraction form
    21,587.65/29,790.93 = 12,156.28/x
  3. Step 3: Cross multiply
    21,587.65x = 29,790.93 × 12,156.28
  4. Step 4: Simplify right side
    21,587.65x = 362,146,886.54
  5. Step 5: Solve for x
    x = 362,146,886.54/21,587.65
  6. Step 6: Final answer
    x = 16,775.65

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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.