Home / 15,715.81-21,690.75-9,746.11

Finding the Fourth Proportional to 15,715.81, 21,690.75 and 9,746.11

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Solution

The fourth proportional to 15,715.81, 21,690.75 and 9,746.11 is: 13,451.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.81 : 21,690.75 = 9,746.11 : x
  2. Step 2: Convert to fraction form
    15,715.81/21,690.75 = 9,746.11/x
  3. Step 3: Cross multiply
    15,715.81x = 21,690.75 × 9,746.11
  4. Step 4: Simplify right side
    15,715.81x = 211,400,435.48
  5. Step 5: Solve for x
    x = 211,400,435.48/15,715.81
  6. Step 6: Final answer
    x = 13,451.45

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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.