Home / 21,006.95-31,501.51-6,211.89

Finding the Fourth Proportional to 21,006.95, 31,501.51 and 6,211.89

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Solution

The fourth proportional to 21,006.95, 31,501.51 and 6,211.89 is: 9,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.95 : 31,501.51 = 6,211.89 : x
  2. Step 2: Convert to fraction form
    21,006.95/31,501.51 = 6,211.89/x
  3. Step 3: Cross multiply
    21,006.95x = 31,501.51 × 6,211.89
  4. Step 4: Simplify right side
    21,006.95x = 195,683,899.42
  5. Step 5: Solve for x
    x = 195,683,899.42/21,006.95
  6. Step 6: Final answer
    x = 9,315.20

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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.