Home / 21,790.87-30,070.51-12,359.23

Finding the Fourth Proportional to 21,790.87, 30,070.51 and 12,359.23

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Solution

The fourth proportional to 21,790.87, 30,070.51 and 12,359.23 is: 17,055.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.87 : 30,070.51 = 12,359.23 : x
  2. Step 2: Convert to fraction form
    21,790.87/30,070.51 = 12,359.23/x
  3. Step 3: Cross multiply
    21,790.87x = 30,070.51 × 12,359.23
  4. Step 4: Simplify right side
    21,790.87x = 371,648,349.31
  5. Step 5: Solve for x
    x = 371,648,349.31/21,790.87
  6. Step 6: Final answer
    x = 17,055.23

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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.