Home / 8,921.84-12,312.45-5,384.36

Finding the Fourth Proportional to 8,921.84, 12,312.45 and 5,384.36

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Solution

The fourth proportional to 8,921.84, 12,312.45 and 5,384.36 is: 7,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.84 : 12,312.45 = 5,384.36 : x
  2. Step 2: Convert to fraction form
    8,921.84/12,312.45 = 5,384.36/x
  3. Step 3: Cross multiply
    8,921.84x = 12,312.45 × 5,384.36
  4. Step 4: Simplify right side
    8,921.84x = 66,294,601.72
  5. Step 5: Solve for x
    x = 66,294,601.72/8,921.84
  6. Step 6: Final answer
    x = 7,430.60

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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.