Home / 21,205.10-31,807.65-21,010.70

Finding the Fourth Proportional to 21,205.10, 31,807.65 and 21,010.70

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Solution

The fourth proportional to 21,205.10, 31,807.65 and 21,010.70 is: 31,516.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.10 : 31,807.65 = 21,010.70 : x
  2. Step 2: Convert to fraction form
    21,205.10/31,807.65 = 21,010.70/x
  3. Step 3: Cross multiply
    21,205.10x = 31,807.65 × 21,010.70
  4. Step 4: Simplify right side
    21,205.10x = 668,300,991.86
  5. Step 5: Solve for x
    x = 668,300,991.86/21,205.10
  6. Step 6: Final answer
    x = 31,516.05

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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.