Home / 10,420.78-14,376.79-6,643.08

Finding the Fourth Proportional to 10,420.78, 14,376.79 and 6,643.08

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Solution

The fourth proportional to 10,420.78, 14,376.79 and 6,643.08 is: 9,164.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.78 : 14,376.79 = 6,643.08 : x
  2. Step 2: Convert to fraction form
    10,420.78/14,376.79 = 6,643.08/x
  3. Step 3: Cross multiply
    10,420.78x = 14,376.79 × 6,643.08
  4. Step 4: Simplify right side
    10,420.78x = 95,506,166.11
  5. Step 5: Solve for x
    x = 95,506,166.11/10,420.78
  6. Step 6: Final answer
    x = 9,164.97

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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.