Home / 39,315.57-54,256.47-21,411.57

Finding the Fourth Proportional to 39,315.57, 54,256.47 and 21,411.57

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Solution

The fourth proportional to 39,315.57, 54,256.47 and 21,411.57 is: 29,548.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,315.57 : 54,256.47 = 21,411.57 : x
  2. Step 2: Convert to fraction form
    39,315.57/54,256.47 = 21,411.57/x
  3. Step 3: Cross multiply
    39,315.57x = 54,256.47 × 21,411.57
  4. Step 4: Simplify right side
    39,315.57x = 1,161,716,205.36
  5. Step 5: Solve for x
    x = 1,161,716,205.36/39,315.57
  6. Step 6: Final answer
    x = 29,548.50

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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.