Home / 47,969.81-71,970.65-21,312.09

Finding the Fourth Proportional to 47,969.81, 71,970.65 and 21,312.09

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Solution

The fourth proportional to 47,969.81, 71,970.65 and 21,312.09 is: 31,975.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,969.81 : 71,970.65 = 21,312.09 : x
  2. Step 2: Convert to fraction form
    47,969.81/71,970.65 = 21,312.09/x
  3. Step 3: Cross multiply
    47,969.81x = 71,970.65 × 21,312.09
  4. Step 4: Simplify right side
    47,969.81x = 1,533,844,863.60
  5. Step 5: Solve for x
    x = 1,533,844,863.60/47,969.81
  6. Step 6: Final answer
    x = 31,975.22

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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.