Home / 21,420.15-32,108.14-8,947.45

Finding the Fourth Proportional to 21,420.15, 32,108.14 and 8,947.45

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Solution

The fourth proportional to 21,420.15, 32,108.14 and 8,947.45 is: 13,411.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.15 : 32,108.14 = 8,947.45 : x
  2. Step 2: Convert to fraction form
    21,420.15/32,108.14 = 8,947.45/x
  3. Step 3: Cross multiply
    21,420.15x = 32,108.14 × 8,947.45
  4. Step 4: Simplify right side
    21,420.15x = 287,285,977.24
  5. Step 5: Solve for x
    x = 287,285,977.24/21,420.15
  6. Step 6: Final answer
    x = 13,411.95

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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.