Home / 21,153.61-31,730.18-8,670.85

Finding the Fourth Proportional to 21,153.61, 31,730.18 and 8,670.85

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Solution

The fourth proportional to 21,153.61, 31,730.18 and 8,670.85 is: 13,006.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.61 : 31,730.18 = 8,670.85 : x
  2. Step 2: Convert to fraction form
    21,153.61/31,730.18 = 8,670.85/x
  3. Step 3: Cross multiply
    21,153.61x = 31,730.18 × 8,670.85
  4. Step 4: Simplify right side
    21,153.61x = 275,127,602.43
  5. Step 5: Solve for x
    x = 275,127,602.43/21,153.61
  6. Step 6: Final answer
    x = 13,006.18

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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.