Home / 38,420.90-53,021.08-21,426.22

Finding the Fourth Proportional to 38,420.90, 53,021.08 and 21,426.22

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Solution

The fourth proportional to 38,420.90, 53,021.08 and 21,426.22 is: 29,568.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,420.90 : 53,021.08 = 21,426.22 : x
  2. Step 2: Convert to fraction form
    38,420.90/53,021.08 = 21,426.22/x
  3. Step 3: Cross multiply
    38,420.90x = 53,021.08 × 21,426.22
  4. Step 4: Simplify right side
    38,420.90x = 1,136,041,209.01
  5. Step 5: Solve for x
    x = 1,136,041,209.01/38,420.90
  6. Step 6: Final answer
    x = 29,568.31

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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.