Home / 21,044.80-31,555.20-7,897.60

Finding the Fourth Proportional to 21,044.80, 31,555.20 and 7,897.60

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Solution

The fourth proportional to 21,044.80, 31,555.20 and 7,897.60 is: 11,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,044.80 : 31,555.20 = 7,897.60 : x
  2. Step 2: Convert to fraction form
    21,044.80/31,555.20 = 7,897.60/x
  3. Step 3: Cross multiply
    21,044.80x = 31,555.20 × 7,897.60
  4. Step 4: Simplify right side
    21,044.80x = 249,210,347.52
  5. Step 5: Solve for x
    x = 249,210,347.52/21,044.80
  6. Step 6: Final answer
    x = 11,841.90

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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.