Home / 15,495.28-21,384.47-8,689.93

Finding the Fourth Proportional to 15,495.28, 21,384.47 and 8,689.93

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Solution

The fourth proportional to 15,495.28, 21,384.47 and 8,689.93 is: 11,992.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.28 : 21,384.47 = 8,689.93 : x
  2. Step 2: Convert to fraction form
    15,495.28/21,384.47 = 8,689.93/x
  3. Step 3: Cross multiply
    15,495.28x = 21,384.47 × 8,689.93
  4. Step 4: Simplify right side
    15,495.28x = 185,829,547.39
  5. Step 5: Solve for x
    x = 185,829,547.39/15,495.28
  6. Step 6: Final answer
    x = 11,992.66

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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.