Home / 15,870.92-21,904.20-9,155.24

Finding the Fourth Proportional to 15,870.92, 21,904.20 and 9,155.24

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Solution

The fourth proportional to 15,870.92, 21,904.20 and 9,155.24 is: 12,635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.92 : 21,904.20 = 9,155.24 : x
  2. Step 2: Convert to fraction form
    15,870.92/21,904.20 = 9,155.24/x
  3. Step 3: Cross multiply
    15,870.92x = 21,904.20 × 9,155.24
  4. Step 4: Simplify right side
    15,870.92x = 200,538,208.01
  5. Step 5: Solve for x
    x = 200,538,208.01/15,870.92
  6. Step 6: Final answer
    x = 12,635.58

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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.