Home / 21,009.79-31,442.18-13,001.27

Finding the Fourth Proportional to 21,009.79, 31,442.18 and 13,001.27

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Solution

The fourth proportional to 21,009.79, 31,442.18 and 13,001.27 is: 19,457.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.79 : 31,442.18 = 13,001.27 : x
  2. Step 2: Convert to fraction form
    21,009.79/31,442.18 = 13,001.27/x
  3. Step 3: Cross multiply
    21,009.79x = 31,442.18 × 13,001.27
  4. Step 4: Simplify right side
    21,009.79x = 408,788,285.17
  5. Step 5: Solve for x
    x = 408,788,285.17/21,009.79
  6. Step 6: Final answer
    x = 19,457.04

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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.