Home / 28,290.36-42,370.95-13,509.72

Finding the Fourth Proportional to 28,290.36, 42,370.95 and 13,509.72

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Solution

The fourth proportional to 28,290.36, 42,370.95 and 13,509.72 is: 20,233.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.36 : 42,370.95 = 13,509.72 : x
  2. Step 2: Convert to fraction form
    28,290.36/42,370.95 = 13,509.72/x
  3. Step 3: Cross multiply
    28,290.36x = 42,370.95 × 13,509.72
  4. Step 4: Simplify right side
    28,290.36x = 572,419,670.63
  5. Step 5: Solve for x
    x = 572,419,670.63/28,290.36
  6. Step 6: Final answer
    x = 20,233.74

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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.