Home / 21,852.13-30,156.15-12,420.76

Finding the Fourth Proportional to 21,852.13, 30,156.15 and 12,420.76

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Solution

The fourth proportional to 21,852.13, 30,156.15 and 12,420.76 is: 17,140.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.13 : 30,156.15 = 12,420.76 : x
  2. Step 2: Convert to fraction form
    21,852.13/30,156.15 = 12,420.76/x
  3. Step 3: Cross multiply
    21,852.13x = 30,156.15 × 12,420.76
  4. Step 4: Simplify right side
    21,852.13x = 374,562,301.67
  5. Step 5: Solve for x
    x = 374,562,301.67/21,852.13
  6. Step 6: Final answer
    x = 17,140.77

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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.