Home / 21,740.10-30,001.50-12,308.46

Finding the Fourth Proportional to 21,740.10, 30,001.50 and 12,308.46

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Solution

The fourth proportional to 21,740.10, 30,001.50 and 12,308.46 is: 16,985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,740.10 : 30,001.50 = 12,308.46 : x
  2. Step 2: Convert to fraction form
    21,740.10/30,001.50 = 12,308.46/x
  3. Step 3: Cross multiply
    21,740.10x = 30,001.50 × 12,308.46
  4. Step 4: Simplify right side
    21,740.10x = 369,272,262.69
  5. Step 5: Solve for x
    x = 369,272,262.69/21,740.10
  6. Step 6: Final answer
    x = 16,985.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.