Home / 21,151.77-31,730.45-7,822.95

Finding the Fourth Proportional to 21,151.77, 31,730.45 and 7,822.95

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Solution

The fourth proportional to 21,151.77, 31,730.45 and 7,822.95 is: 11,735.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.77 : 31,730.45 = 7,822.95 : x
  2. Step 2: Convert to fraction form
    21,151.77/31,730.45 = 7,822.95/x
  3. Step 3: Cross multiply
    21,151.77x = 31,730.45 × 7,822.95
  4. Step 4: Simplify right side
    21,151.77x = 248,225,684.71
  5. Step 5: Solve for x
    x = 248,225,684.71/21,151.77
  6. Step 6: Final answer
    x = 11,735.46

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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.