Home / 30,628.10-42,271.36-18,698.31

Finding the Fourth Proportional to 30,628.10, 42,271.36 and 18,698.31

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Solution

The fourth proportional to 30,628.10, 42,271.36 and 18,698.31 is: 25,806.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.10 : 42,271.36 = 18,698.31 : x
  2. Step 2: Convert to fraction form
    30,628.10/42,271.36 = 18,698.31/x
  3. Step 3: Cross multiply
    30,628.10x = 42,271.36 × 18,698.31
  4. Step 4: Simplify right side
    30,628.10x = 790,402,946.66
  5. Step 5: Solve for x
    x = 790,402,946.66/30,628.10
  6. Step 6: Final answer
    x = 25,806.46

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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.