Home / 30,495.55-42,061.26-21,533.71

Finding the Fourth Proportional to 30,495.55, 42,061.26 and 21,533.71

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Solution

The fourth proportional to 30,495.55, 42,061.26 and 21,533.71 is: 29,700.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,495.55 : 42,061.26 = 21,533.71 : x
  2. Step 2: Convert to fraction form
    30,495.55/42,061.26 = 21,533.71/x
  3. Step 3: Cross multiply
    30,495.55x = 42,061.26 × 21,533.71
  4. Step 4: Simplify right side
    30,495.55x = 905,734,975.07
  5. Step 5: Solve for x
    x = 905,734,975.07/30,495.55
  6. Step 6: Final answer
    x = 29,700.56

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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.