Home / 21,202.40-31,803.60-12,898.70

Finding the Fourth Proportional to 21,202.40, 31,803.60 and 12,898.70

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Solution

The fourth proportional to 21,202.40, 31,803.60 and 12,898.70 is: 19,348.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.40 : 31,803.60 = 12,898.70 : x
  2. Step 2: Convert to fraction form
    21,202.40/31,803.60 = 12,898.70/x
  3. Step 3: Cross multiply
    21,202.40x = 31,803.60 × 12,898.70
  4. Step 4: Simplify right side
    21,202.40x = 410,225,095.32
  5. Step 5: Solve for x
    x = 410,225,095.32/21,202.40
  6. Step 6: Final answer
    x = 19,348.05

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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.