Home / 13,985.18-19,300.18-8,681.72

Finding the Fourth Proportional to 13,985.18, 19,300.18 and 8,681.72

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Solution

The fourth proportional to 13,985.18, 19,300.18 and 8,681.72 is: 11,981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.18 : 19,300.18 = 8,681.72 : x
  2. Step 2: Convert to fraction form
    13,985.18/19,300.18 = 8,681.72/x
  3. Step 3: Cross multiply
    13,985.18x = 19,300.18 × 8,681.72
  4. Step 4: Simplify right side
    13,985.18x = 167,558,758.71
  5. Step 5: Solve for x
    x = 167,558,758.71/13,985.18
  6. Step 6: Final answer
    x = 11,981.17

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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.