Home / 21,005.12-31,500.28-6,210.12

Finding the Fourth Proportional to 21,005.12, 31,500.28 and 6,210.12

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Solution

The fourth proportional to 21,005.12, 31,500.28 and 6,210.12 is: 9,312.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.12 : 31,500.28 = 6,210.12 : x
  2. Step 2: Convert to fraction form
    21,005.12/31,500.28 = 6,210.12/x
  3. Step 3: Cross multiply
    21,005.12x = 31,500.28 × 6,210.12
  4. Step 4: Simplify right side
    21,005.12x = 195,620,518.83
  5. Step 5: Solve for x
    x = 195,620,518.83/21,005.12
  6. Step 6: Final answer
    x = 9,312.99

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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.