Home / 30,777.32-42,463.26-18,828.20

Finding the Fourth Proportional to 30,777.32, 42,463.26 and 18,828.20

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Solution

The fourth proportional to 30,777.32, 42,463.26 and 18,828.20 is: 25,977.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,777.32 : 42,463.26 = 18,828.20 : x
  2. Step 2: Convert to fraction form
    30,777.32/42,463.26 = 18,828.20/x
  3. Step 3: Cross multiply
    30,777.32x = 42,463.26 × 18,828.20
  4. Step 4: Simplify right side
    30,777.32x = 799,506,751.93
  5. Step 5: Solve for x
    x = 799,506,751.93/30,777.32
  6. Step 6: Final answer
    x = 25,977.14

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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.