Home / 15,328.16-21,154.82-9,358.55

Finding the Fourth Proportional to 15,328.16, 21,154.82 and 9,358.55

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Solution

The fourth proportional to 15,328.16, 21,154.82 and 9,358.55 is: 12,916.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.16 : 21,154.82 = 9,358.55 : x
  2. Step 2: Convert to fraction form
    15,328.16/21,154.82 = 9,358.55/x
  3. Step 3: Cross multiply
    15,328.16x = 21,154.82 × 9,358.55
  4. Step 4: Simplify right side
    15,328.16x = 197,978,440.71
  5. Step 5: Solve for x
    x = 197,978,440.71/15,328.16
  6. Step 6: Final answer
    x = 12,916.00

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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.