Home / 15,430.84-21,294.46-8,718.64

Finding the Fourth Proportional to 15,430.84, 21,294.46 and 8,718.64

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Solution

The fourth proportional to 15,430.84, 21,294.46 and 8,718.64 is: 12,031.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.84 : 21,294.46 = 8,718.64 : x
  2. Step 2: Convert to fraction form
    15,430.84/21,294.46 = 8,718.64/x
  3. Step 3: Cross multiply
    15,430.84x = 21,294.46 × 8,718.64
  4. Step 4: Simplify right side
    15,430.84x = 185,658,730.73
  5. Step 5: Solve for x
    x = 185,658,730.73/15,430.84
  6. Step 6: Final answer
    x = 12,031.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.