Home / 21,126.80-29,210.64-18,502.40

Finding the Fourth Proportional to 21,126.80, 29,210.64 and 18,502.40

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Solution

The fourth proportional to 21,126.80, 29,210.64 and 18,502.40 is: 25,582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.80 : 29,210.64 = 18,502.40 : x
  2. Step 2: Convert to fraction form
    21,126.80/29,210.64 = 18,502.40/x
  3. Step 3: Cross multiply
    21,126.80x = 29,210.64 × 18,502.40
  4. Step 4: Simplify right side
    21,126.80x = 540,466,945.54
  5. Step 5: Solve for x
    x = 540,466,945.54/21,126.80
  6. Step 6: Final answer
    x = 25,582.05

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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.