Home / 40,718.91-61,075.47-12,638.30

Finding the Fourth Proportional to 40,718.91, 61,075.47 and 12,638.30

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Solution

The fourth proportional to 40,718.91, 61,075.47 and 12,638.30 is: 18,956.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,718.91 : 61,075.47 = 12,638.30 : x
  2. Step 2: Convert to fraction form
    40,718.91/61,075.47 = 12,638.30/x
  3. Step 3: Cross multiply
    40,718.91x = 61,075.47 × 12,638.30
  4. Step 4: Simplify right side
    40,718.91x = 771,889,807.12
  5. Step 5: Solve for x
    x = 771,889,807.12/40,718.91
  6. Step 6: Final answer
    x = 18,956.54

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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.