Home / 28,518.30-42,777.45-7,458.30

Finding the Fourth Proportional to 28,518.30, 42,777.45 and 7,458.30

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Solution

The fourth proportional to 28,518.30, 42,777.45 and 7,458.30 is: 11,187.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.30 : 42,777.45 = 7,458.30 : x
  2. Step 2: Convert to fraction form
    28,518.30/42,777.45 = 7,458.30/x
  3. Step 3: Cross multiply
    28,518.30x = 42,777.45 × 7,458.30
  4. Step 4: Simplify right side
    28,518.30x = 319,047,055.34
  5. Step 5: Solve for x
    x = 319,047,055.34/28,518.30
  6. Step 6: Final answer
    x = 11,187.45

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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.