Home / 21,208.32-31,811.13-6,417.72

Finding the Fourth Proportional to 21,208.32, 31,811.13 and 6,417.72

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Solution

The fourth proportional to 21,208.32, 31,811.13 and 6,417.72 is: 9,626.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.32 : 31,811.13 = 6,417.72 : x
  2. Step 2: Convert to fraction form
    21,208.32/31,811.13 = 6,417.72/x
  3. Step 3: Cross multiply
    21,208.32x = 31,811.13 × 6,417.72
  4. Step 4: Simplify right side
    21,208.32x = 204,154,925.22
  5. Step 5: Solve for x
    x = 204,154,925.22/21,208.32
  6. Step 6: Final answer
    x = 9,626.17

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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.