Home / 30,031.80-44,999.10-18,918.60

Finding the Fourth Proportional to 30,031.80, 44,999.10 and 18,918.60

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Solution

The fourth proportional to 30,031.80, 44,999.10 and 18,918.60 is: 28,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,031.80 : 44,999.10 = 18,918.60 : x
  2. Step 2: Convert to fraction form
    30,031.80/44,999.10 = 18,918.60/x
  3. Step 3: Cross multiply
    30,031.80x = 44,999.10 × 18,918.60
  4. Step 4: Simplify right side
    30,031.80x = 851,319,973.26
  5. Step 5: Solve for x
    x = 851,319,973.26/30,031.80
  6. Step 6: Final answer
    x = 28,347.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.