Home / 43,005.81-64,506.42-13,420.25

Finding the Fourth Proportional to 43,005.81, 64,506.42 and 13,420.25

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Solution

The fourth proportional to 43,005.81, 64,506.42 and 13,420.25 is: 20,129.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,005.81 : 64,506.42 = 13,420.25 : x
  2. Step 2: Convert to fraction form
    43,005.81/64,506.42 = 13,420.25/x
  3. Step 3: Cross multiply
    43,005.81x = 64,506.42 × 13,420.25
  4. Step 4: Simplify right side
    43,005.81x = 865,692,283.01
  5. Step 5: Solve for x
    x = 865,692,283.01/43,005.81
  6. Step 6: Final answer
    x = 20,129.66

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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.