Home / 30,628.28-42,271.65-18,698.56

Finding the Fourth Proportional to 30,628.28, 42,271.65 and 18,698.56

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Solution

The fourth proportional to 30,628.28, 42,271.65 and 18,698.56 is: 25,806.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.28 : 42,271.65 = 18,698.56 : x
  2. Step 2: Convert to fraction form
    30,628.28/42,271.65 = 18,698.56/x
  3. Step 3: Cross multiply
    30,628.28x = 42,271.65 × 18,698.56
  4. Step 4: Simplify right side
    30,628.28x = 790,418,983.82
  5. Step 5: Solve for x
    x = 790,418,983.82/30,628.28
  6. Step 6: Final answer
    x = 25,806.84

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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.