Home / 16,420.50-22,703.49-15,686.10

Finding the Fourth Proportional to 16,420.50, 22,703.49 and 15,686.10

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Solution

The fourth proportional to 16,420.50, 22,703.49 and 15,686.10 is: 21,688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,420.50 : 22,703.49 = 15,686.10 : x
  2. Step 2: Convert to fraction form
    16,420.50/22,703.49 = 15,686.10/x
  3. Step 3: Cross multiply
    16,420.50x = 22,703.49 × 15,686.10
  4. Step 4: Simplify right side
    16,420.50x = 356,129,214.49
  5. Step 5: Solve for x
    x = 356,129,214.49/16,420.50
  6. Step 6: Final answer
    x = 21,688.09

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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.