Home / 30,746.79-42,435.09-18,808.20

Finding the Fourth Proportional to 30,746.79, 42,435.09 and 18,808.20

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Solution

The fourth proportional to 30,746.79, 42,435.09 and 18,808.20 is: 25,958.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,746.79 : 42,435.09 = 18,808.20 : x
  2. Step 2: Convert to fraction form
    30,746.79/42,435.09 = 18,808.20/x
  3. Step 3: Cross multiply
    30,746.79x = 42,435.09 × 18,808.20
  4. Step 4: Simplify right side
    30,746.79x = 798,127,659.74
  5. Step 5: Solve for x
    x = 798,127,659.74/30,746.79
  6. Step 6: Final answer
    x = 25,958.08

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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.