Finding the Fourth Proportional to 19,781,182.80, 29,671,774.20 and 12,128,432.40
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Solution
The fourth proportional to 19,781,182.80, 29,671,774.20 and 12,128,432.40 is: 18,192,648.60
Step by Step Solution
- Step 1: Write the proportion equation
19,781,182.80 : 29,671,774.20 = 12,128,432.40 : x - Step 2: Convert to fraction form
19,781,182.80/29,671,774.20 = 12,128,432.40/x - Step 3: Cross multiply
19,781,182.80x = 29,671,774.20 × 12,128,432.40 - Step 4: Simplify right side
19,781,182.80x = 359,872,107,572,764.06 - Step 5: Solve for x
x = 359,872,107,572,764.06/19,781,182.80 - Step 6: Final answer
x = 18,192,648.60
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.