Home / 21,690.36-29,938.59-15,710.67

Finding the Fourth Proportional to 21,690.36, 29,938.59 and 15,710.67

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Solution

The fourth proportional to 21,690.36, 29,938.59 and 15,710.67 is: 21,684.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.36 : 29,938.59 = 15,710.67 : x
  2. Step 2: Convert to fraction form
    21,690.36/29,938.59 = 15,710.67/x
  3. Step 3: Cross multiply
    21,690.36x = 29,938.59 × 15,710.67
  4. Step 4: Simplify right side
    21,690.36x = 470,355,307.76
  5. Step 5: Solve for x
    x = 470,355,307.76/21,690.36
  6. Step 6: Final answer
    x = 21,684.99

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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.