Home / 30,751.20-42,422.40-19,434.96

Finding the Fourth Proportional to 30,751.20, 42,422.40 and 19,434.96

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Solution

The fourth proportional to 30,751.20, 42,422.40 and 19,434.96 is: 26,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,751.20 : 42,422.40 = 19,434.96 : x
  2. Step 2: Convert to fraction form
    30,751.20/42,422.40 = 19,434.96/x
  3. Step 3: Cross multiply
    30,751.20x = 42,422.40 × 19,434.96
  4. Step 4: Simplify right side
    30,751.20x = 824,477,647.10
  5. Step 5: Solve for x
    x = 824,477,647.10/30,751.20
  6. Step 6: Final answer
    x = 26,811.23

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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.