Home / 22,390.77-30,898.40-12,318.63

Finding the Fourth Proportional to 22,390.77, 30,898.40 and 12,318.63

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Solution

The fourth proportional to 22,390.77, 30,898.40 and 12,318.63 is: 16,999.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,390.77 : 30,898.40 = 12,318.63 : x
  2. Step 2: Convert to fraction form
    22,390.77/30,898.40 = 12,318.63/x
  3. Step 3: Cross multiply
    22,390.77x = 30,898.40 × 12,318.63
  4. Step 4: Simplify right side
    22,390.77x = 380,625,957.19
  5. Step 5: Solve for x
    x = 380,625,957.19/22,390.77
  6. Step 6: Final answer
    x = 16,999.23

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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.