Home / 15,711.63-21,681.86-8,637.99

Finding the Fourth Proportional to 15,711.63, 21,681.86 and 8,637.99

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Solution

The fourth proportional to 15,711.63, 21,681.86 and 8,637.99 is: 11,920.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.63 : 21,681.86 = 8,637.99 : x
  2. Step 2: Convert to fraction form
    15,711.63/21,681.86 = 8,637.99/x
  3. Step 3: Cross multiply
    15,711.63x = 21,681.86 × 8,637.99
  4. Step 4: Simplify right side
    15,711.63x = 187,287,646.67
  5. Step 5: Solve for x
    x = 187,287,646.67/15,711.63
  6. Step 6: Final answer
    x = 11,920.32

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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.