Home / 30,911.81-42,642.60-19,562.18

Finding the Fourth Proportional to 30,911.81, 42,642.60 and 19,562.18

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Solution

The fourth proportional to 30,911.81, 42,642.60 and 19,562.18 is: 26,985.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,911.81 : 42,642.60 = 19,562.18 : x
  2. Step 2: Convert to fraction form
    30,911.81/42,642.60 = 19,562.18/x
  3. Step 3: Cross multiply
    30,911.81x = 42,642.60 × 19,562.18
  4. Step 4: Simplify right side
    30,911.81x = 834,182,216.87
  5. Step 5: Solve for x
    x = 834,182,216.87/30,911.81
  6. Step 6: Final answer
    x = 26,985.87

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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.