Home / 21,000.15-31,501.44-8,519.67

Finding the Fourth Proportional to 21,000.15, 31,501.44 and 8,519.67

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Solution

The fourth proportional to 21,000.15, 31,501.44 and 8,519.67 is: 12,780.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.15 : 31,501.44 = 8,519.67 : x
  2. Step 2: Convert to fraction form
    21,000.15/31,501.44 = 8,519.67/x
  3. Step 3: Cross multiply
    21,000.15x = 31,501.44 × 8,519.67
  4. Step 4: Simplify right side
    21,000.15x = 268,381,873.32
  5. Step 5: Solve for x
    x = 268,381,873.32/21,000.15
  6. Step 6: Final answer
    x = 12,780.00

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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.