Home / 21,979.95-32,977.59-15,981.63

Finding the Fourth Proportional to 21,979.95, 32,977.59 and 15,981.63

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Solution

The fourth proportional to 21,979.95, 32,977.59 and 15,981.63 is: 23,978.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.95 : 32,977.59 = 15,981.63 : x
  2. Step 2: Convert to fraction form
    21,979.95/32,977.59 = 15,981.63/x
  3. Step 3: Cross multiply
    21,979.95x = 32,977.59 × 15,981.63
  4. Step 4: Simplify right side
    21,979.95x = 527,035,641.67
  5. Step 5: Solve for x
    x = 527,035,641.67/21,979.95
  6. Step 6: Final answer
    x = 23,978.02

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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.