Home / 30,674.98-42,314.18-18,407.21

Finding the Fourth Proportional to 30,674.98, 42,314.18 and 18,407.21

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Solution

The fourth proportional to 30,674.98, 42,314.18 and 18,407.21 is: 25,391.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,674.98 : 42,314.18 = 18,407.21 : x
  2. Step 2: Convert to fraction form
    30,674.98/42,314.18 = 18,407.21/x
  3. Step 3: Cross multiply
    30,674.98x = 42,314.18 × 18,407.21
  4. Step 4: Simplify right side
    30,674.98x = 778,885,955.85
  5. Step 5: Solve for x
    x = 778,885,955.85/30,674.98
  6. Step 6: Final answer
    x = 25,391.57

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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.