Home / 20,725.76-31,088.81-12,851.19

Finding the Fourth Proportional to 20,725.76, 31,088.81 and 12,851.19

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Solution

The fourth proportional to 20,725.76, 31,088.81 and 12,851.19 is: 19,276.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.76 : 31,088.81 = 12,851.19 : x
  2. Step 2: Convert to fraction form
    20,725.76/31,088.81 = 12,851.19/x
  3. Step 3: Cross multiply
    20,725.76x = 31,088.81 × 12,851.19
  4. Step 4: Simplify right side
    20,725.76x = 399,528,139.93
  5. Step 5: Solve for x
    x = 399,528,139.93/20,725.76
  6. Step 6: Final answer
    x = 19,276.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.