Home / 15,686.95-21,637.07-13,312.74

Finding the Fourth Proportional to 15,686.95, 21,637.07 and 13,312.74

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Solution

The fourth proportional to 15,686.95, 21,637.07 and 13,312.74 is: 18,362.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.95 : 21,637.07 = 13,312.74 : x
  2. Step 2: Convert to fraction form
    15,686.95/21,637.07 = 13,312.74/x
  3. Step 3: Cross multiply
    15,686.95x = 21,637.07 × 13,312.74
  4. Step 4: Simplify right side
    15,686.95x = 288,048,620.71
  5. Step 5: Solve for x
    x = 288,048,620.71/15,686.95
  6. Step 6: Final answer
    x = 18,362.31

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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.