Home / 21,044.70-31,579.20-7,898.40

Finding the Fourth Proportional to 21,044.70, 31,579.20 and 7,898.40

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Solution

The fourth proportional to 21,044.70, 31,579.20 and 7,898.40 is: 11,852.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,044.70 : 31,579.20 = 7,898.40 : x
  2. Step 2: Convert to fraction form
    21,044.70/31,579.20 = 7,898.40/x
  3. Step 3: Cross multiply
    21,044.70x = 31,579.20 × 7,898.40
  4. Step 4: Simplify right side
    21,044.70x = 249,425,153.28
  5. Step 5: Solve for x
    x = 249,425,153.28/21,044.70
  6. Step 6: Final answer
    x = 11,852.16

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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.