Home / 28,440.19-42,666.51-8,720.29

Finding the Fourth Proportional to 28,440.19, 42,666.51 and 8,720.29

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Solution

The fourth proportional to 28,440.19, 42,666.51 and 8,720.29 is: 13,082.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.19 : 42,666.51 = 8,720.29 : x
  2. Step 2: Convert to fraction form
    28,440.19/42,666.51 = 8,720.29/x
  3. Step 3: Cross multiply
    28,440.19x = 42,666.51 × 8,720.29
  4. Step 4: Simplify right side
    28,440.19x = 372,064,340.49
  5. Step 5: Solve for x
    x = 372,064,340.49/28,440.19
  6. Step 6: Final answer
    x = 13,082.34

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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.