Home / 43,220.57-64,830.86-13,640.72

Finding the Fourth Proportional to 43,220.57, 64,830.86 and 13,640.72

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Solution

The fourth proportional to 43,220.57, 64,830.86 and 13,640.72 is: 20,461.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,220.57 : 64,830.86 = 13,640.72 : x
  2. Step 2: Convert to fraction form
    43,220.57/64,830.86 = 13,640.72/x
  3. Step 3: Cross multiply
    43,220.57x = 64,830.86 × 13,640.72
  4. Step 4: Simplify right side
    43,220.57x = 884,339,284.46
  5. Step 5: Solve for x
    x = 884,339,284.46/43,220.57
  6. Step 6: Final answer
    x = 20,461.08

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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.