Home / 21,056.73-31,560.80-7,900.71

Finding the Fourth Proportional to 21,056.73, 31,560.80 and 7,900.71

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Solution

The fourth proportional to 21,056.73, 31,560.80 and 7,900.71 is: 11,841.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.73 : 31,560.80 = 7,900.71 : x
  2. Step 2: Convert to fraction form
    21,056.73/31,560.80 = 7,900.71/x
  3. Step 3: Cross multiply
    21,056.73x = 31,560.80 × 7,900.71
  4. Step 4: Simplify right side
    21,056.73x = 249,352,688.66
  5. Step 5: Solve for x
    x = 249,352,688.66/21,056.73
  6. Step 6: Final answer
    x = 11,841.95

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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.