Home / 21,303.70-31,919.10-13,503.40

Finding the Fourth Proportional to 21,303.70, 31,919.10 and 13,503.40

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Solution

The fourth proportional to 21,303.70, 31,919.10 and 13,503.40 is: 20,232.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.70 : 31,919.10 = 13,503.40 : x
  2. Step 2: Convert to fraction form
    21,303.70/31,919.10 = 13,503.40/x
  3. Step 3: Cross multiply
    21,303.70x = 31,919.10 × 13,503.40
  4. Step 4: Simplify right side
    21,303.70x = 431,016,374.94
  5. Step 5: Solve for x
    x = 431,016,374.94/21,303.70
  6. Step 6: Final answer
    x = 20,232.00

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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.