Home / 15,628.06-21,516.78-12,653.74

Finding the Fourth Proportional to 15,628.06, 21,516.78 and 12,653.74

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Solution

The fourth proportional to 15,628.06, 21,516.78 and 12,653.74 is: 17,421.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,628.06 : 21,516.78 = 12,653.74 : x
  2. Step 2: Convert to fraction form
    15,628.06/21,516.78 = 12,653.74/x
  3. Step 3: Cross multiply
    15,628.06x = 21,516.78 × 12,653.74
  4. Step 4: Simplify right side
    15,628.06x = 272,267,739.76
  5. Step 5: Solve for x
    x = 272,267,739.76/15,628.06
  6. Step 6: Final answer
    x = 17,421.72

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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.