Home / 21,210.10-29,256.85-13,653.94

Finding the Fourth Proportional to 21,210.10, 29,256.85 and 13,653.94

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Solution

The fourth proportional to 21,210.10, 29,256.85 and 13,653.94 is: 18,834.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.10 : 29,256.85 = 13,653.94 : x
  2. Step 2: Convert to fraction form
    21,210.10/29,256.85 = 13,653.94/x
  3. Step 3: Cross multiply
    21,210.10x = 29,256.85 × 13,653.94
  4. Step 4: Simplify right side
    21,210.10x = 399,471,274.49
  5. Step 5: Solve for x
    x = 399,471,274.49/21,210.10
  6. Step 6: Final answer
    x = 18,834.01

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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.