Home / 15,312.55-21,130.78-9,354.19

Finding the Fourth Proportional to 15,312.55, 21,130.78 and 9,354.19

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Solution

The fourth proportional to 15,312.55, 21,130.78 and 9,354.19 is: 12,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.55 : 21,130.78 = 9,354.19 : x
  2. Step 2: Convert to fraction form
    15,312.55/21,130.78 = 9,354.19/x
  3. Step 3: Cross multiply
    15,312.55x = 21,130.78 × 9,354.19
  4. Step 4: Simplify right side
    15,312.55x = 197,661,178.54
  5. Step 5: Solve for x
    x = 197,661,178.54/15,312.55
  6. Step 6: Final answer
    x = 12,908.45

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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.