Home / 10,869.09-15,001.68-6,621.53

Finding the Fourth Proportional to 10,869.09, 15,001.68 and 6,621.53

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Solution

The fourth proportional to 10,869.09, 15,001.68 and 6,621.53 is: 9,139.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,869.09 : 15,001.68 = 6,621.53 : x
  2. Step 2: Convert to fraction form
    10,869.09/15,001.68 = 6,621.53/x
  3. Step 3: Cross multiply
    10,869.09x = 15,001.68 × 6,621.53
  4. Step 4: Simplify right side
    10,869.09x = 99,334,041.06
  5. Step 5: Solve for x
    x = 99,334,041.06/10,869.09
  6. Step 6: Final answer
    x = 9,139.13

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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.