Home / 21,012.51-31,521.08-8,530.73

Finding the Fourth Proportional to 21,012.51, 31,521.08 and 8,530.73

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Solution

The fourth proportional to 21,012.51, 31,521.08 and 8,530.73 is: 12,797.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.51 : 31,521.08 = 8,530.73 : x
  2. Step 2: Convert to fraction form
    21,012.51/31,521.08 = 8,530.73/x
  3. Step 3: Cross multiply
    21,012.51x = 31,521.08 × 8,530.73
  4. Step 4: Simplify right side
    21,012.51x = 268,897,804.71
  5. Step 5: Solve for x
    x = 268,897,804.71/21,012.51
  6. Step 6: Final answer
    x = 12,797.03

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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.