Home / 39,970.20-59,955.30-21,307.80

Finding the Fourth Proportional to 39,970.20, 59,955.30 and 21,307.80

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Solution

The fourth proportional to 39,970.20, 59,955.30 and 21,307.80 is: 31,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,970.20 : 59,955.30 = 21,307.80 : x
  2. Step 2: Convert to fraction form
    39,970.20/59,955.30 = 21,307.80/x
  3. Step 3: Cross multiply
    39,970.20x = 59,955.30 × 21,307.80
  4. Step 4: Simplify right side
    39,970.20x = 1,277,515,541.34
  5. Step 5: Solve for x
    x = 1,277,515,541.34/39,970.20
  6. Step 6: Final answer
    x = 31,961.70

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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.