Home / 30,628.61-42,272.05-18,698.81

Finding the Fourth Proportional to 30,628.61, 42,272.05 and 18,698.81

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Solution

The fourth proportional to 30,628.61, 42,272.05 and 18,698.81 is: 25,807.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.61 : 42,272.05 = 18,698.81 : x
  2. Step 2: Convert to fraction form
    30,628.61/42,272.05 = 18,698.81/x
  3. Step 3: Cross multiply
    30,628.61x = 42,272.05 × 18,698.81
  4. Step 4: Simplify right side
    30,628.61x = 790,437,031.26
  5. Step 5: Solve for x
    x = 790,437,031.26/30,628.61
  6. Step 6: Final answer
    x = 25,807.15

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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.